Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e802134b00fdb39…

MALICIOUS

PDF

62.6 KB Created: 2021-06-19 13:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f710ba01c6b5dd973d3a2236f5c4ff8 SHA-1: 0fbc283f119340a3363ba41970bccdf52a2e31bf SHA-256: 8e802134b00fdb39657ce1626d8e504efde7b3f589a9289465de7890ad8a51a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4ace0824d---2347297121.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/807d7a73b249e1b3599cf291e2a9fe2e/xixonisupatovogof.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/f3k89i8c71pth50fe08ovtngse/28541107109.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d77251f10---sazax.pdf
    • https://duproject.com/uploadEditor/files/goxalap.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/v1of06j2kmdrio2g6cn29k8p0m/lelikitafal.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/eg8sg9phpgeid8gaa6ufd4lpl2/42710372750.pdf
    • http://longarmacademy.net/fckeditor/userfiles/file/66258195362.pdf
    • http://sotel-perm.ru/site/file/59349100552.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0097111391---23435409472.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/2837a429161ed8d9a47f3b6999e8c893/81044805272.pdf
    • https://atraba-holding.com/userfiles/file/73385711855.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0ee34aeb1---13511722459.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/55qchuf8ms1l10ldcgjf41nm0r/jererupadutuvomeka.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb7f8f1c29---33287166503.pdf
    • http://shinies.ru/img/lib/file/99214857859.pdf
    • http://bebelino.ru/userfiles/file/gomomapaximi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=123movies+skam+france
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b699.bin
ad8fc1063e3b2abb146cfd17b89f59a2c2ce79f4e8ed6a922beef41e19e49fb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB699 5372 bytes
font_01_sfnt_off0000c8dc.bin
ebd030a6eabd8a39e1077ecf7f80392566d3a7472cbf1b1b270a1c6f9bce109f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DC 10860 bytes

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