Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f01286a72f99d2…

MALICIOUS

PDF

77.1 KB Created: 2021-05-26 05:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c0fb9338f23d90a84543ec452e17c03d SHA-1: 404fd2d624557e76942b8624912ee03e0e20661f SHA-256: 58f01286a72f99d2701d9224754c86277eea0031e3b5a6b29350aee7d88e2884
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/strik?utm_term=how+to+reset+a+mxq+pro+4k+box PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417329/normal_605d1bff8e70e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420244/normal_60684a9bc829e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501054/normal_603ccec67b79b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377656/normal_5fc91743b3493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496571/normal_60359c88d83db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388285/normal_605137c9da3b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409238/normal_603e9e0e0949a.pdfIn PDF document text
    • https://petuxomurekag.weebly.com/uploads/1/3/0/8/130874153/32cbd33f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418574/normal_5fdbc3de1c3a1.pdfIn PDF document text
    • https://tatefazaseg.weebly.com/uploads/1/3/4/0/134016926/021f55fd8487.pdfIn PDF document text
    • https://gavizixuf.weebly.com/uploads/1/3/5/3/135334805/gaxegalo-duwesusadaru-xugezopege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_6037a4f4e95d3.pdfIn PDF document text
    • https://nemaxololele.weebly.com/uploads/1/3/5/3/135304154/wovepareluzenem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466379/normal_5fc5b1a1d02bb.pdfIn PDF document text
    • https://keziputaxa.weebly.com/uploads/1/3/2/7/132711938/fuxekape-xemebevitiv-finekoje-gupixazebasa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480582/normal_5fdf8e6fbef8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465394/normal_5ff919907fa09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412895/normal_5ff928d28e09e.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/seriposuj/combining_like_terms_using_distributive_property_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/michael_talbot_singer.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/how_to_use_rice_cooker_panasonic.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/gidovoribenitubagivo.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_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 5472 bytes
SHA-256: 9333bcf1df20f65ad27ce0b5ebdb871bcf2d6d81c747ccfb335d834e3160dc30
font_01_sfnt_off0000ff96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF96 11996 bytes
SHA-256: 61d39c4fe7449934ef5b3302b5462db43d04b3593d55f041d36ee517542894ce