Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8dd6a62f70cdb66…

MALICIOUS

PDF

183.2 KB Created: 2021-08-07 01:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 006b14a6db92f6ea769ccfcd94a75691 SHA-1: 37e534fe9bf081861310739652e69c790d479d0b SHA-256: f8dd6a62f70cdb66012f01405446208c1b2fd80c8b2a056a1a90841ef9029573
252 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing or malware distribution lure. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of urgency lures and password-protected archive instructions further supports a malicious intent, likely to bypass security filters and trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 11

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://inwebjor.ru/uplcv?utm_term=how+to+get+rewards+on+chick+fil+a+app PDF link annotation
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/6l7iklefim41k73mndoou446i2/57256814346.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/16230530951592206464.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/38902953284.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/44458633039.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608b13d7c0e41---77606828056.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/47b8176bdea3c1fe5e80af3e220d4291/92818108618.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/fdceb13f8f43ebf3fea8ede4c94d0c5a/potadudojujawug.pdfIn PDF document text
    • https://proxus.nl/file/67033450011.pdfIn PDF document text
    • http://atsrealtyvietnam.com/upload/files/58653787693.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/zejubufapepux.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/58fd242854b979b259d8de3f7b46fa26/jareretetewivedadomug.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/rosatunenol.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0b67aa8c4---xokufapakolatujuge.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3fb19017b---zokadun.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/bixafuniregilanomuvexebol.pdfIn PDF document text
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/24780643396.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/vedinil.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/44117550404.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92116310446.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/10775541622.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/topagitamebi.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160817a5146634---botugegivifowokuj.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/dajipinixelokato.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zagigorimiradufazol.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000268f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x268F6 11068 bytes
SHA-256: 20589c1568ffa92fc096b26f3b362358a88989c67a309d96082dfbb99e5fdb98
font_01_sfnt_off0002827f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2827F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00029a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29A91 18696 bytes
SHA-256: db05b47eb5859e728948d13dae7a57fc54b69940de4e9394d3faf244abf0ef8c

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