Malicious PDF — malware analysis report

Static analysis result for SHA-256 b267d6055f58f6d5…

MALICIOUS

PDF

103.7 KB Created: 2021-02-13 13:52:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bb191969b5b96cd72ad9183b75bfb983 SHA-1: 326828a4285520676fa441767785bb4390974678 SHA-256: b267d6055f58f6d5f4eff356d2604dbaa8d1e2c6fe2d1aa01dc86d8f6a66cfca
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, suggesting it functions as a link farm or phishing lure. The primary URL, 'https://jottigo.ru/aws?utm_term=yom+kippur+prayers+reform+judaism', appears to be a deceptive entry point designed to trick users into clicking through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://jottigo.ru/aws?utm_term=yom+kippur+prayers+reform+judaism PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485810/normal_5fd84e5e6b4e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420014/normal_600b12449424c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473047/normal_5fffa662a5795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_601b73aecaaf2.pdfIn PDF document text
    • https://cdn.sqhk.co/suxunuke/ibhamhj/two_asteroid_belts_in_our_solar_system.pdfIn PDF document text
    • https://kurepisafigovu.weebly.com/uploads/1/3/1/3/131398088/moxejog_zumolol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462065/normal_5fcd44880e110.pdfIn PDF document text
    • https://veriketosamu.weebly.com/uploads/1/3/4/6/134675732/binedalido.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/jhjageg/mummy_mystery_word_search_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/pfJUnjb/free_iranian_chat_rooms_uk.pdfIn PDF document text
    • https://jokiputukalak.weebly.com/uploads/1/3/1/1/131164130/nebaparigexixi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454545/normal_600ba549d394d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489033/normal_600f7c881e8aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_60138445a493c.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/dssgizP/89286827478.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463279/normal_5ff25e39ae903.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490934/normal_5ff90322c8440.pdfIn PDF document text
    • https://vojumemij.weebly.com/uploads/1/3/4/4/134473557/9819380.pdfIn PDF document text
    • https://cdn.sqhk.co/webuposiba/hj7hahj/34549245884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460060/normal_601fc9ac25758.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497359/normal_5fe0c7b1c025c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00014fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FD1 5360 bytes
SHA-256: a2bfc2bef8d3022aa27792f8c1313d94c4a70d92550e90fb5ea06f81425ba340
font_01_sfnt_off00016206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16206 14008 bytes
SHA-256: 679443c5ae739f3cbfa1347ffafa6de9818dd37551f9736b01cac530ff4135db

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