Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6117d842be11bc1…

MALICIOUS

PDF

87.5 KB Created: 2021-08-18 17:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6e1be6f959e8b21c9db6fd3802b9a464 SHA-1: 15e7c396ab8010ca7346e75b5b277341ac393246 SHA-256: d6117d842be11bc1648325a7cef12aa50f15c6a9470922d005f96efff5285ba7
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a malicious lure. It contains a visual download button and urgency language, instructing the user to take immediate action, potentially by disabling security software. The document also hosts a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • 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://receptabc.hu/images_banner/files/sariwitukebazowowepime.pdf In PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/683eed3bdf017c498b84d9ed7acefdf4/bexuzerexoloramoxaporale.pdfIn PDF document text
    • https://aczv.fr/userfiles/file/51151027039.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8f5876682---35910758714.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/e4feb6fd5be04696931eb3ccf8508826/39164545023.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/67595405352.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/0ibi827a7a7m02gmoaglqv0qa3/nuriwemisosesadosuge.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738629ecdb9---rotadil.pdfIn PDF document text
    • http://abpaluso.com/upload/file/kavegidor.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/02ba83e66c7ac3f61b47d147649a464d/31798606376.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/muminobafupet.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5c29cf7b0---rizawebifibezuko.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/d89cc8b124e6e65e8c1ed6cf3c249c93/koluxikepopuvureberumo.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/gp23a0stn6hs4anu82huj5gtvg/14311754236.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072f1b32c2ea---lijalugijimupafegirixa.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/66617707b0c4a03b0618ecf40d3b9c5c/welobixibo.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210718/0043516065.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/vujenokuruteriz.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/31155884076.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fb807a689---43235513860.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6d643dd9baaf9485ea4b3922cdc88d0b/1774977783.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/wazabosudibe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=any+pdf+to+dwg+converter+2013+registration+codePDF link annotation
    • 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_off0000ed38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED38 11460 bytes
SHA-256: 4298bd4924114352befe840fd558de4b6e91ef4c5c5119143f3842bd04c02329
font_01_sfnt_off00010879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10879 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001208b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208B 17656 bytes
SHA-256: 752effdc7f500d4c30301fee4864079d26f12a0dbe3dd6ec9dec2d48830ee3dd

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