Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0275756612065e…

MALICIOUS

PDF

70.6 KB Created: 2021-06-10 00:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d388960157459401a87ea0c12527f860 SHA-1: e2a2b6d0e943beab9dc001192c5fd4c3092c89b3 SHA-256: 1c0275756612065eb2432dc0c5fa368d4cb47fa59dc4e975183a1bc8370a636e
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 0.9997

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://archism.ru/pbw?utm_term=solutions+workbook+key+3rd+edition PDF link annotation
    • https://tanofome.weebly.com/uploads/1/3/5/3/135316841/6b285d7261686e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451229/normal_5fceb5ea76a13.pdfIn PDF document text
    • https://nuxajitavira.weebly.com/uploads/1/3/1/8/131871558/noguz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_6015c92e8406e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491665/normal_600515db21cb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382949/normal_60bc4e5317ca3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422627/normal_600d36da00afc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_605d5b4cc0d0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_60c05bf2c6343.pdfIn PDF document text
    • https://rodazikajoreme.weebly.com/uploads/1/3/0/8/130874285/mozisovumeso_zedesojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459058/normal_60bdce086c661.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382405/normal_602467ba50aa4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403415/normal_5fde8b09218bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fatakalewene.pbworks.com/f/verutabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39f654d1-2996-4ba2-bcfe-2b92fcf07c40/how_to_lead_a_team_as_a_new_manager.pdfIn PDF document text
    • http://gipovowi.pbworks.com/w/file/fetch/144839874/american_inside_out_evolution_advanced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48da85a1-2b06-4dc0-8a86-fb07da746b75/rc122_remote_volume_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c08654d-eeb1-4f6e-bc13-b5ef62fcd67c/28942520179.pdfIn PDF document text
    • http://duziruromeja.pbworks.com/w/file/fetch/144510435/self_employed_income_and_expenses_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a7d4ba-0389-4c72-b3c4-a81a2739db6b/barebadukesowubugupigor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5fe7bdc-76b8-4ca4-8a20-08a4d654cc7c/ea_sports_ufc_3_xbox_360_freeboot.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_off0000d17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17E 5272 bytes
SHA-256: 95d15760651dc890a0bef348c10ddd968d71331e6460ba5162972a445d46bdcb
font_01_sfnt_off0000e393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE393 12600 bytes
SHA-256: 68d09f2d02691c27cf113fc75eab7a4382dc5fdd594c6d2836be08082c2bc209

Open this report in the interactive analyzer, or submit your own file for analysis.