Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e49fd63b2702ed…

MALICIOUS

PDF

94.3 KB Created: 2021-09-07 07:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1a2878e596eb692f1838ba97b30259ff SHA-1: 73ecd2b8b95a3a7245c0e5475f77b15c5047b667 SHA-256: d6e49fd63b2702ed00ed84dde12482d265f79c4f57e620ef70f3a7b766c4e810
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://archism.ru/uplcv?utm_term=iphone+xr+manual+shutdown PDF link annotation
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/masitujeremiwul.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/nupexu.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cec2811601e---vijuxuwi.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/162943457468422793720.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16127262289ba9---zugevujobitafaxawuxede.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2852f95414---52873779201.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b850f1a555---18937763910.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/39557478926.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca06f5d7a5f---54159652458.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16134ab5dd9212---91427304898.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/37647812515.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/49adcab9eb1dffc1ffcce704a28e15a9/67452506203.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160c25a730bf3a---jawegibatagototonuvad.pdfIn PDF document text
    • http://ray-king67reunion.com/clients/41562/File/94655924254.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/lagipijoradimupom.pdfIn PDF document text
    • http://christopherdallo.com/file/geremiwepononir.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/vasawax.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/27754490676.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/16786048641.pdfIn PDF document text
    • https://austarpharma.austarchina.com/upload/files/nuvunemuwibupi.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/24478843208.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160879b20c4f08---tajomi.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/6283e0e047859e91677669fa1666284f/55483485895.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607019ed1ae5e---jegixovizo.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/jotefebikupizixowipi.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_off00010abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000122cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CF 18260 bytes
SHA-256: 96ece016cd4bcac696d33d07509e10d9a46e9adbf6cb5a64f8b240733a1a7a1a
font_02_sfnt_off000152ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152AB 10804 bytes
SHA-256: d87a33ec55007f57b531a1b2ee2fe49cbecd15bc505697a28e1f6208fa667c26

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