Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6e96f02f86d211…

MALICIOUS

PDF

82.7 KB Created: 2021-09-02 09:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 477fa767e3914feef186157b45183fa2 SHA-1: 5da9289d8ca0ed6ad19fcc020674dc180850ed0a SHA-256: fd6e96f02f86d211424a5b807cc770b1f71c44ae190909a89002c853e4c0dbd3
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' in one URL indicates a potential phishing or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://lawrenceyezersky.com/userfiles/file/95819728200.pdf In PDF document text
    • http://iphysiology.ru/upload/damojowuvotitojuke.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/litujun.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/baragorimipalafelane.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610be6d2b1087---ketukuwov.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b87b6f2458---60632820293.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079959d17c93---notar.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/vetifur.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/0dbbd221e5bf5eb37ad80313b3d44728/55801032621.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfb9983549---wiroruva.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/a5a9826c8fbaf803ff5ec0a3dcc8ee95/32673192718.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/70464836919.pdfIn PDF document text
    • https://bor-diing.com/upload/files/vekawoxedijoroguturusoxi.pdfIn PDF document text
    • http://travellerisland.com/files/94088152010.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/1931933220.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/lukesapive.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/17989f13d04b638b343bfb3e4f6e48b2/94496288686.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/lefabuxusebitefavasajoxip.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c6ba03645---71832888239.pdfIn PDF document text
    • https://istanajp2.com/contents//files/sawojukajizudilota.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d088513a9c7---1561946766.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/putanufirexewagusafufam.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/7143d83783a699718ed4cf11e9308f0d/domevurojogarub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=excel+vba+print+to+pdf+and+emailPDF 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_off0000d899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD899 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 19416 bytes
SHA-256: b8fb478bd7b60af6d6ed08c0e834b90a6e4e519fa3095b27e42d18a8afee6eba
font_02_sfnt_off0001230c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230C 10904 bytes
SHA-256: 3d45767462b15e848d7433d7df66c1e7b422e2a561b37dfa46f740af527a7445

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