Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01be19e00bcf373…

MALICIOUS

PDF

87.0 KB Created: 2021-04-03 11:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 41ec3dc28d2b00f6d4ad46cb7ba29b3e SHA-1: ada0e92def11abc1e79e3be135b67fbe69e9a70e SHA-256: b01be19e00bcf373f24ad818b4113b6c989b7b859d75e7416672ff4ba65528ac
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/aws?utm_term=was+the+ottoman+empire+bigger+than+the+roman+empire PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420903/normal_5fdd85572bfba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417049/normal_6010eefa8b354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_603248185e952.pdfIn PDF document text
    • http://foselosen.sportsontheweb.net/lemomamileg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_60648082836d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483361/normal_5fc5b61c91a39.pdfIn PDF document text
    • http://fibutogu.mywebcommunity.org/mckenzie_low_back_exercises.pdfIn PDF document text
    • http://muwiduvepobuz.mygamesonline.org/14075296530.pdfIn PDF document text
    • http://vukabuv.22web.org/xewolixutimi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448536/normal_5fe604cf403c4.pdfIn PDF document text
    • http://sebekeruxa.iblogger.org/bavejasawewozavom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458132/normal_6033428181f28.pdfIn PDF document text
    • http://takovod.66ghz.com/fumakatuvunezogex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_5fd911223a317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421218/normal_6049c538ab6e7.pdfIn PDF document text
    • http://xozowilozoga.mywebcommunity.org/71549397997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482847/normal_602c5f436a408.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_eef55562b9314bcfb401471a57d11a2c.pdf?index=trueIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_40772d5c4e1149d88c46e4a4434a63c2.pdf?index=trueIn PDF document text
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_519d8683ccc447c7b75258d04e646d87.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/specialized_elite_bicycle_computer_manual.pdfIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_73d772180f104d2b88b0ebc4882caaa2.pdf?index=trueIn PDF document text
    • http://gofumakexoj.onlinewebshop.net/pdf_to_word_i_love_you.pdfIn PDF document text
    • http://lexawelezalum.epizy.com/asics_gel-_quantum_360_5_white_sheetrock.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/molizuvuwud.pdfIn PDF document text
    • http://razidekorob.rf.gd/38577857624.pdfIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_5dffc158274f4cee892eb91116e13c86.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_off00011554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11554 5356 bytes
SHA-256: 08ccdc52fe0a84fadd15e7283c35993ae5cbb47a9aa4219998f9a3f31d886927
font_01_sfnt_off00012766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12766 11168 bytes
SHA-256: d40673e8e5c33ebf8b70c786a07e2844b3a00951be843821055c58530fd13d6c