Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e2f2db5d7c2230…

MALICIOUS

PDF

78.9 KB Created: 2021-09-07 09:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9324f030d0f2baadc464f0e6a769c346 SHA-1: d8efea260e5d4557d57139c640a13bf9b171ab37 SHA-256: 74e2f2db5d7c2230b47df144240a5da2115fe783016f9118ba012475937a6666
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://foodchemsino.com/d/files/razefepija.pdf In PDF document text
    • http://zulassungsdienst4you.de/bilder/file/73303002756.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/7d121f2ab53cb530c5f8ab5865b3c77b/lewireku.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/38e1e00dd639d619832b90540433af67/zabadovunisuzisozoxag.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b018295406c---xojabupafaganigumamezido.pdfIn PDF document text
    • http://gojjang.com/uploads/files/88003979750.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/13125979253.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/kuwitupewunaxosowezuso.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/malajokujomatozezetom.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/dusanawunilizali.pdfIn PDF document text
    • https://pasarangroup1.com/contents//files/mukegomorexiwu.pdfIn PDF document text
    • http://www.prakashirrigation.com/uploads/fck/files/37062636828.pdfIn PDF document text
    • http://yhbinternational.com/userfiles/file/26835358334.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/82034822016.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/r880eocmjfvb61mtdqev97tq84/51484704845.pdfIn PDF document text
    • http://aspbae.org/userfiles/file/bivimevuvodarux.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/82354612244.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/29698799999.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents//files/40118578641.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/b529ed9c2fa63490a561105c80bab0bf/38493156589.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/f76f0e197fafbadd445fe0fdbdf66628/kowewoxoxubowulago.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1c937f968---44693252055.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/lataboxaxavo.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/rajav.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/20567705253.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/qfvaj0sk0837a4gg0q0ib7q10a/jivinatovot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=2002+gmc+envoy+repair+manual+freePDF 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_off0000d1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B3 16488 bytes
SHA-256: 73957e6ea30565ece2a271a986db20a4bc5d3d8339ab17aadb78ee733c99128d
font_01_sfnt_off0000fc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11479 10980 bytes
SHA-256: 0114c51216bfee18165510deddab4b0988ea8fe86a202414115407ae789b1b9b

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