Malicious PDF — malware analysis report

Static analysis result for SHA-256 2429b2c6ff8ca3b3…

MALICIOUS

PDF

69.9 KB Created: 2021-03-31 08:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 12ce196574b0f098739ab51f86b1cfe7 SHA-1: 547b682e4ef8f58e2c7d5f99eba648e11ec1e6ce SHA-256: 2429b2c6ff8ca3b3dc80956f95dc88428f6abc62af9ea4320c1b0b8594801f8f
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, embedding numerous URLs that redirect to disposable hosting, likely to distribute further malicious content or phish for credentials. The document body, though heavily obfuscated, contains a title related to 'blackjack card game', suggesting a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/strik?utm_term=how+to+blackjack+card+game PDF link annotation
    • http://tonukavugu.mygamesonline.org/42054322022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475383/normal_604110673508b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476947/normal_6056769467c3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493201/normal_602aae2414827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465000/normal_603e8930a9f6c.pdfIn PDF document text
    • http://gunenekaroz.mypressonline.com/iatf_spc_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417207/normal_6055f6c1d4eef.pdfIn PDF document text
    • http://tetupamino.mywebcommunity.org/how_to_turn_off_siemens_underfloor_heating.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492529/normal_60241e29603d0.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/botapubejususutinutetufa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446166/normal_5ffb7f5f3a47d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5fd9d0f658d4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_21f0ed68269d4fb9ac620d8c4a95aa92.pdf?index=trueIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_6933021b59fa42e5a22f5a473b656b7d.pdf?index=trueIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_57c74f7448684353a1957a022e4705d0.pdf?index=trueIn PDF document text
    • http://vunonam.atwebpages.com/49065829182.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/tinkle_comics_free_download.pdfIn PDF document text
    • https://4a31e3f8-49e3-4331-b1a9-c0bb7a6b9dbc.filesusr.com/ugd/599f1c_7466e212a6a04c9d83d1ca61dad7f0db.pdf?index=trueIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/homemade_low_purine_diet_for_dogs.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/64405511189.pdfIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_38b66ea872ba4e15a470b5c41117ed9a.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_off0000d163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD163 5412 bytes
SHA-256: 229aada4af0ec06b1727b6ab14b6706f3d625d5d9c6bb7fd2e0acb0f8d2ba9c6
font_01_sfnt_off0000e3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CE 11260 bytes
SHA-256: 22624ea54b31b987e14537154a72da99bf455d5c5214bc85a878a485059faf79