Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe12a03f275d586e…

MALICIOUS

PDF

85.7 KB Created: 2021-07-02 23:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 034b4d2be317d4d2f97ee8c9378dc56b SHA-1: 85c875e2ea68ec33bbcf277c88262ee30d407474 SHA-256: fe12a03f275d586e2850abdf985487ef24d1d891fadf713ba858d2f3d7aadd28
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely used for phishing or distributing further malware. No scripts were extracted, but the primary attack pattern involves leveraging external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://queure.ru/uplcv?utm_term=godfather+3+online+streaming PDF link annotation
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/c5645f4a06acf070d872e38ba7d44182/puxexepipamujixeg.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/ab1ac7b56f90d78a173964f1b84391bf/43062064452.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/zerevirinelavogal.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c103201994b---9450685082.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/lotisawuw.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/3823372d598922ecd4b2832b19d755a5/pavisozexibom.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/2morh2rj84u4qo1mmsln313f7o/79188560784.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/ef317784b7b1b5d424eeba1822bbfa58/nasejigazunipekolokixesox.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160853cf483f5d---31861303766.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/255d37d837b3a6fc56e4f574b0d57ff2/galupeluredobodobox.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160898a70062de---22012657112.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/4538717784.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/qa176p8q3ar48gh1sv8lbadlre/31234189935.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/m6f2lp3skdiehugmr2f7f721ls/57079224132.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/fikibozuwasaz.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/kefufomizixokalidezoruvi.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/2775057837.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/8578517090.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/bewixux.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/710e9441a088187015c5eee1c1f0bb4b/tusawixopuk.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ec4a63e2d---17087392139.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-6-21/20210621144812866375.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/6ea2938803ebee00d1807a0795056d39/63292700515.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BF 17096 bytes
SHA-256: bd59715d21f06e1809211ae2766a29618f5910f9f28eed68922f35c90bc1fb2a
font_02_sfnt_off00013054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13054 11012 bytes
SHA-256: b2e0ce046d427357db4f5303c3680c255d87c9239b6bc4d31d7e4d5079483573