Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a861a9f07c9f7f…

MALICIOUS

PDF

76.2 KB Created: 2021-02-14 02:15:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 99a83be52e6abc9e27c4b70ea5156d09 SHA-1: 299593167c21492aae5acf36ffb44002e007929b SHA-256: 12a861a9f07c9f7fc5e8f21e7692b4bc087410302a40ed019a6582055d95cd04
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with many pointing to disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful content.

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://seumenha.ru/123?utm_term=clue+discover+the+secrets+rulebook PDF link annotation
    • https://cdn.sqhk.co/rajunakeb/cJjijcC/kizasakeguteguwiserosivas.pdfIn PDF document text
    • http://zenelis.iblogger.org/86284992612.pdfIn PDF document text
    • https://pajilolupifi.weebly.com/uploads/1/3/2/3/132302794/fexixiwo.pdfIn PDF document text
    • http://detonic-official.website/8796127306ovx1j.pdfIn PDF document text
    • https://nojamatisi.weebly.com/uploads/1/3/1/3/131384142/6185401.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/51df0.pdfIn PDF document text
    • http://evakuator-uga.ru/arthdal_chronicles_season_2_sub_indo4bqv9.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/4mE8ugd/82230640292.pdfIn PDF document text
    • http://nefuwumimo.iblogger.org/72816446226.pdfIn PDF document text
    • https://zuwositoxo.weebly.com/uploads/1/3/5/3/135315809/9250457.pdfIn PDF document text
    • https://minawitagolufu.weebly.com/uploads/1/3/5/3/135312922/4e457c1f9.pdfIn PDF document text
    • http://jopkapopka.online/road_accident_lawyers_near_mebaoi1.pdfIn PDF document text
    • https://gutoserenenew.weebly.com/uploads/1/3/2/6/132681448/2951584.pdfIn PDF document text
    • http://store50off.info/86375842115w5zfu.pdfIn PDF document text
    • https://laregokirula.weebly.com/uploads/1/3/0/9/130969776/gigexep_jajajolu_xonim_mivup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vaguxupinirulop.epizy.com/86230810118.pdfIn PDF document text
    • http://pakafadudu.epizy.com/todexibofozuv.pdfIn PDF document text
    • http://jizuwugi.rf.gd/ample_guitar_m_lite_vst.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_off0000ee58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 4988 bytes
SHA-256: 36d97442fa209dbb880ede0ac0958b0f78d3aea9be1eef740169f0b129dfb581
font_01_sfnt_off0000ff45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF45 10572 bytes
SHA-256: 264e6f7da0eaff70dff35db1445efbff835bff3a642e85899c77177aaca31a83

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