Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d9778c3ff2f8ef…

MALICIOUS

PDF

83.9 KB Created: 2021-08-17 06:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e24ef661b512d06303b3f119464ec431 SHA-1: e76027bbd1d48bf814e85e189ebc0b71cb6f19db SHA-256: 32d9778c3ff2f8ef7a8ad4753d924976a2db430effbbccd0b8338d87a92ef951
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of external URIs and link farms points towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://ore-processing.ru/d/files/lifunukedekopapora.pdf In PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/41450836464.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/42433825794.pdfIn PDF document text
    • https://service-panev.com/userfiles/21350150257.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081467f1394a---85658736750.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/pusixofipovupasufubivi.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cee98c5e67---xiwejenibujal.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/nenozovuxa.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/bdf6aae46a109d5fe873d7c689501d50/73889045751.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/149da5c41f92ca061d8a5c21b6e8521c/37962581572.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac27aa9a189---gezosojemidixiv.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607189c93d78e---96853436657.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b567847aca6---kebudovowage.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/9878548c426391586162545dce98e600/30253746066.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e15af2d68---pilopet.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/19787380267.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/21807310243.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/52033778014.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81b1c3fea0---webuxabizodugodufom.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/95787244640.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/debopativimaduguxemi.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/fumemabexezuzawebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=autocad+2017+with+crack+download+utorrent+64+bitPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/869143a88b7ef1d8c022e33f55d1c3eb/57056198074.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_off0000e0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF903 11288 bytes
SHA-256: a56c47814be1df54ff19ad3d9a9d9f6a5f567351dcff271ce765900758d1aa71
font_02_sfnt_off000113b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B0 17268 bytes
SHA-256: 919f45d526ef7bea58b3fc2e86978bd31c931c65ab8bbb45a712ad161174cf49

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