Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eec2b7f5e2e7d5f…

MALICIOUS

PDF

86.2 KB Created: 2021-06-27 11:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f476f92b92aaca33722b15f926718802 SHA-1: 7e28c58021f566536f06ea5f819df0128a3cc2a3 SHA-256: 8eec2b7f5e2e7d5fe3931f62e5969a6f0447bca80c58a23806619485b0996a1e
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to WordPress upload directories on various domains, suggesting a link farm designed to host or distribute malicious content. The presence of urgency lures further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b561c3a9473---relaregelajaviribanaw.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/57daf9d8386aa84ea2af8d882977f653/79607103443.pdf
    • http://hakkabrothers.com/userfiles/file///tasisozimasuxibajedifakin.pdf
    • https://bangprice.com/bangprice.com/beta/cms_image/file/xeruburegi.pdf
    • https://lawina-radom.pl/files/file/1068391749.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c265bbf20f5---43291611653.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092ee5f9a524---tapotaxenobikawix.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d85aaba400---56435259684.pdf
    • https://hospvetcentral.pt/site/upload/file/52488145899.pdf
    • https://matrainagycsalados.hu/userfiles/file/supodefodakulotapugeke.pdf
    • http://houselandia.ru/files/wogoworugu.pdf
    • http://www.jindatunnel.com/up_files/file/12979863592.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609452c4a5294---xiteza.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b971430bc82---loperipojikixubudezasuxiv.pdf
    • http://osc-pribor.ru/products_pictures/file/fawefijabamijoluk.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978725884f9---65111734580.pdf
    • http://kasintorn.com/images/upload/files/liwimanajaw.pdf
    • http://ipmarketing.net/userfiles/file/folunonudorutolu.pdf
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/21088112317.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077ae921e7a2---fevenakurekewimab.pdf
    • http://ritadas.in/userfiles/file/rorugevutator.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/kbh1ggkjgkpngl3gkjc6rjii16/69435264840.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=missionary+position+christopher+hitchens+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb80.bin
065f10724f3586f82be51a7b06cbe3463259e9aa4e9ffe867433e27d18a50290
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB80 18516 bytes
font_01_sfnt_off00011a93.bin
bda7d81f03fdbd77711bed21ed7a1e938927b38443a52a23cb9c506ca10c7aca
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A93 10776 bytes
font_02_sfnt_off00013366.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13366 16792 bytes