Malicious PDF — malware analysis report

Static analysis result for SHA-256 94325f4d8c8a4307…

MALICIOUS

PDF

78.7 KB Created: 2021-03-18 00:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1aa23c234fb2eae565c88b41c3bede39 SHA-1: 9060effb9362c421c13e395275d8dbe6d7c0af84 SHA-256: 94325f4d8c8a4307f44f0d089be74b41a0645fb4a85571db0a6e43dca0ff4674
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=max+lucado+devotional+on+hope PDF link annotation
    • http://usesol.xyz/guximarexorumisiw1vo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485698/normal_6016c9b05ac9e.pdfIn PDF document text
    • http://latencfsrt.space/52247805048tz5wx.pdfIn PDF document text
    • http://megalit-korolev.ru/nordictrack_c_1270_pro_treadmill_troubleshooting6jtzj.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/hcOhhii/33559167941.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385009/normal_5fdd3ac1dd884.pdfIn PDF document text
    • https://cdn.sqhk.co/nivavepe/iaifcX7/vocabulary_jam_bots.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/OosXpig/moviestarplanet_email_change.pdfIn PDF document text
    • http://rukozhop-guide.com/dikosoxiwifumesopowemarosiralz.pdfIn PDF document text
    • https://cdn.sqhk.co/sifomujotaxa/84cjdEt/80s_mania_wrestling_returns_beginner_s_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496580/normal_604a4b029cdaf.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/iBjjhel/lubidaji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1375d9c-3e06-4c49-b77d-0fafec399e76/zuzesiluwavavodiledab.pdfIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_ea11682d90824c83940316cc355ad1f9.pdf?index=trueIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_ec936b6db940499f8cbf2a6d39c564be.pdf?index=trueIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_447f9e0c4d98475c8d732b429911e3f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/94393014-868b-481d-a08c-351fe23b0894/rokunonozikaman.pdfIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_bb1626509bda4223abe0dabb6ba87e18.pdf?index=trueIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_41c4559b8b9140a49da93f69cfa4ef40.pdf?index=trueIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_a1d505dcd5ad4de2bdfd60b30c572832.pdf?index=trueIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_34abc1c0c7fb41eab50e6da28319b871.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3fb9a2d-fac8-483a-bc98-e137619acab9/what_is_psychoanalysis_theory.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF515 5020 bytes
SHA-256: 1f03333e9bb748f553758f2256db4612e4bd3dd736aa191eaf1b47d0434c5317
font_01_sfnt_off0001063f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063F 11052 bytes
SHA-256: eef3dd0f8a1e519bb3a6b3877db6d2094212ad448789ddec43ec4c06a33bb9e0