Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a282a723d33fdc8…

MALICIOUS

PDF

68.2 KB Created: 2021-09-27 11:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: efbfdd809e809770d579a92d823154b9 SHA-1: 453a4a7cd71ed1f3c2ad98b6d1c52341db9113bd SHA-256: 6a282a723d33fdc8cc53a85aeb52d9d3b3e8c01804aafc035c1e887d284fcf4e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The PDF_IMAGE_LURE heuristic indicates it's likely an image-based document designed to trick users into clicking through to these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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.
  • 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 http://ppogrimall.com/upload/editor_image/file/63820582954.pdf In PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/bniqaqg0f5qlart9a985ats4i7/25286336066.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/zifezegom.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/21c7000637d4c3e46219e07e328c3c6c/jabap.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/lobet.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/bivazi.pdfIn PDF document text
    • https://chsins.tw/uploads/files/202109210227373648.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/wupofexexitimuwalu.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f38c64e352---94711219254.pdfIn PDF document text
    • https://strategieb2b.ca/userfiles/file/petemipu.pdfIn PDF document text
    • https://energooptima.hu/upload/File/77201732056.pdfIn PDF document text
    • https://alident.centralcms.cloud/galeria/files/43031431959.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/3a2918967bd0cb77448b2d953e93ff47/famotiwexodadinivajo.pdfIn PDF document text
    • http://usairsprings.com/userfiles/file/64713675954.pdfIn PDF document text
    • http://elektron.be/public/userimgs/files/38636504534.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021925238436239.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/40217730472.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/75565927850.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/fijozodazetafikijivijo.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/sejafuwifuwovuvenepopemin.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/57090120502.pdfIn PDF document text
    • http://cartopack.be/Images/file/xijolalifajesuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=read+big+nate+online+free+pdfPDF 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_off0000af14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF14 10692 bytes
SHA-256: 08e556dec3654265542037841e8ff1ef1bbde37ecf3067d9017daf887457f826
font_01_sfnt_off0000c73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4C 14200 bytes
SHA-256: a70d9479a5ada7012e218a012946fbcef7292d617f09c63664fe94cd5de6bcb3

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