Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29b152431f54e13…

MALICIOUS

PDF

74.1 KB Created: 2021-04-15 07:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4fdef98407a92deaed2e4f6d98fdb4ec SHA-1: 69fba1f6daff1d16bed8c62491848c6bac983989 SHA-256: c29b152431f54e134db2e69fe836a7ea6e4269eeeb42bbf63c57c944e55fb95e
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites, possibly as part of a phishing campaign or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=adt+key+fob+not+working PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386363/normal_5ff28f98eff6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_601ba0eb691da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_600f1814718fd.pdfIn PDF document text
    • http://wozovumorawoka.sportsontheweb.net/easy_english_speaking_tips.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_604fc8b582633.pdfIn PDF document text
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/zezetofe.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/vosaxefezare.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/sonerigelozaxul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479674/normal_60094630a4e02.pdfIn PDF document text
    • https://fugubujezowegi.weebly.com/uploads/1/3/4/5/134502495/5163375.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/tufijidisugejabe.pdfIn PDF document text
    • http://dedigevobunobe.medianewsonline.com/automated_guided_vehicle_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/what_is_the_theme_of_fahrenheit_451_part_3.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/railway_empire_signals_guide.pdfIn PDF document text
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_ffed290bf95246289a9aafc3b89ea5ac.pdf?index=trueIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_094918391ada4daaa6d7ff849cdb63e2.pdf?index=trueIn PDF document text
    • http://kofaxafogi.myartsonline.com/nerukud.pdfIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_9924ac61af5743e7bd7d508eba34c5d5.pdf?index=trueIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_4db4d086cdff41ec96c24ce683dde6ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/53313031876.pdfIn PDF document text
    • http://pidodexogejax.myartsonline.com/arifureta_novela_ligera_mega.pdfIn PDF document text
    • https://b9b086bb-db5c-4c47-b99c-4ca3d8c772c1.filesusr.com/ugd/c090b7_06cf5b872e034f02a70dca47763e08ce.pdf?index=trueIn 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_off0000e4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C8 5044 bytes
SHA-256: fa3cc6ebc1b8188740ea95d3c078af21df45c57c661ecd6da533852eff5e02a5
font_01_sfnt_off0000f622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF622 10944 bytes
SHA-256: 1c8e9ebf16c35ebe74c8a4a2ebd54cd717959a1b9d893e904f59197856bcaf66