Malicious PDF — malware analysis report

Static analysis result for SHA-256 b642384279c84f12…

MALICIOUS

PDF

86.3 KB Created: 2021-03-13 22:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 49b22ef2abb58d6a68f77210d71a875c SHA-1: c5f998544973fedb9edb8236fe2943351b5ce5cb SHA-256: b642384279c84f1226015adf9d3bb4fcb4a252a6da1a6a010eb2a87a44f9fc14
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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
  • 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://ponafet.ru/wix?keyword=fios+tv+one+remote+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481270/normal_604375e6efdd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393639/normal_5ff1d77ac6fcb.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/how_to_clean_shark_professional_steam_mop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479932/normal_600aab932c474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_604b8939b5d5f.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/76410566715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_601d90dc2ac0c.pdfIn PDF document text
    • http://fosireditoj.mygamesonline.org/converter_bmp_to_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_6037c6e20b7e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455208/normal_5ff3e7584f81c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_2099cd3aba9444f59722fd3a4eb1fc65.pdf?index=trueIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_c13867784a5f4be5b722523ce00ce6c5.pdf?index=trueIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_517b44c0832843a3906aeb1cf4befc90.pdf?index=trueIn PDF document text
    • http://wemojeduxikuzem.rf.gd/poulan_chainsaw_p3314_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb3584ca-27d2-428f-b512-04c12b871fdd/86600580684.pdfIn PDF document text
    • http://dubejatusir.epizy.com/dikezozirubuwuvonizaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31cd1379-0447-47e4-9ed2-6a753781ca5b/speed_of_trust_summary_youtube.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001063e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063E 4728 bytes
SHA-256: 8290bbec33b7245de889c255a6299b7c9631703d62a3d80d8c286e21da9d2d26
font_01_sfnt_off0001162e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162E 11328 bytes
SHA-256: 34bc7087a66625d34ce2619e4b69505867fcf33bdf29b6bf64321f77a3d2d22c
font_02_sfnt_off00013cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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