Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb74392ab5a8dc6…

MALICIOUS

PDF

81.6 KB Created: 2021-09-10 10:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fe748ae29cb5dcb66fb2d65697d02810 SHA-1: d95001a51b8feca6adc397de13f5939566ff6c65 SHA-256: 3cb74392ab5a8dc654ce122917b4710ec3c39a399d14100e9ef0914680a3bbbe
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into believing there are changes to payment or banking instructions. The numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggest a phishing or credential harvesting attempt. No scripts were extracted, but the PDF structure itself likely contains malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 https://philabc.ru/uplcv?utm_term=login+with+office+365+account+windows+10 PDF link annotation
    • http://vswet.ru/f/90377548048.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/b538d3ab57d948aca52ce637f3312fd8/bofuzagotabuvufogepad.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/40561795142.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/26311231717.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/42964733293.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/49027603865.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/57370479546.pdfIn PDF document text
    • https://akemi.ro/hirek/file/55960305908.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/51580816913.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/27419899752.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/tebodoliboxepavurate.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/zufopinodapenezovu.pdfIn PDF document text
    • http://marktoby.com/akram/know_news/admin/userfiles/file/35931166769.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/xorofedur.pdfIn PDF document text
    • https://gentrilieu.vn/userfiles/file/bipeluvuvapitinipuverute.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/pegabosejukawavikanog.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/76310854553.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/ckthqn92e6hm2l2jb8i1m0ubqb/41600194982.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/13910347674.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/93499025540.pdfIn PDF document text
    • http://cathugo-catamarans.de/res/wysiwyg/file/53233720263.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/6844702624.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ecf3d7f77---61078863349.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/zumosijodisosefufasiwo.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/govopame.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD632 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 11400 bytes
SHA-256: 7d1ebd75fe6aa6958baec2c999103f824f4af1a67a2fe2f12b0cb2d4e8c85b8f
font_02_sfnt_off00010910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10910 18084 bytes
SHA-256: d5135a1d2f062d674daa25e6ebc00b9f5a0a678e1d9342392ded178d6897dfa2

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