Malicious PDF — malware analysis report

Static analysis result for SHA-256 86197413276a180c…

MALICIOUS

PDF

70.1 KB Created: 2021-06-06 15:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 80bb21833d9c04c2676d8c88cc9ae304 SHA-1: d6dd04de4af61136a4d3409df66d6382f6f1b45a SHA-256: 86197413276a180c231a3caf78362d2f0afafb2c5f90a74946c658e4a19d129e
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous URLs indicate a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the link farm and the ML classification strongly suggest malicious intent.

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://laborke.ru/pbw?utm_term=saudi+aramco+approved+vendor+list+pdf PDF link annotation
    • https://volenasidopawo.weebly.com/uploads/1/3/4/2/134265528/f91f1eac442b11.pdfIn PDF document text
    • https://pakokapixufepu.weebly.com/uploads/1/3/4/6/134659136/6be7b.pdfIn PDF document text
    • https://wiwotejezewol.weebly.com/uploads/1/3/4/6/134691264/wanexowasab_rovof_wevamigulagigi.pdfIn PDF document text
    • https://badivilaw.weebly.com/uploads/1/3/4/8/134848312/pexozor.pdfIn PDF document text
    • https://dagigofeno.weebly.com/uploads/1/3/4/8/134887245/kivotewelamun_vinuxawonax_gajede_tugirege.pdfIn PDF document text
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/wugoxavarufakogem.pdfIn PDF document text
    • https://susenuvow.weebly.com/uploads/1/3/4/8/134883676/wokomusimalowuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_6018a84180517.pdfIn PDF document text
    • https://dapobatajixafaw.weebly.com/uploads/1/3/4/3/134310280/gosunapimivitoditox.pdfIn PDF document text
    • https://gibotekiwifij.weebly.com/uploads/1/3/4/4/134444926/podakaki_vigilitewixo_pelid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_60559db095ca2.pdfIn PDF document text
    • https://koxamuru.weebly.com/uploads/1/3/4/8/134890845/3378858.pdfIn PDF document text
    • https://gitikatul.weebly.com/uploads/1/3/4/7/134749175/ladapedisegenovu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://negovijalulu.pbworks.com/f/rowuti.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/gawomula.pdfIn PDF document text
    • http://nolumemonip.pbworks.com/f/torabobupojugevowoto.pdfIn PDF document text
    • http://nukuxim.pbworks.com/w/file/fetch/144509535/22080746996.pdfIn PDF document text
    • http://jinotofatum.pbworks.com/f/monthly_income_expense_report_template.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/f/miui_unlock_tool_latest_version_download.pdfIn PDF document text
    • http://tufukamapaf.pbworks.com/f/the_rock_cycle_worksheet_1_answer_key.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_off0000d1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E5 5464 bytes
SHA-256: 2e76147a32e2b4495b0ab42cd8acf19b4c69c1fff4defcba268dc11a390bbffd
font_01_sfnt_off0000e46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46B 10840 bytes
SHA-256: 88175d70172d6f32e71135053978014c3b57502c87b5ff6fa8f36914a1369ee9