Malicious PDF — malware analysis report

Static analysis result for SHA-256 abeaf7179e6eec7a…

MALICIOUS

PDF

80.1 KB Created: 2021-02-03 00:58:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7631469045e700e357ee13ff23175da6 SHA-1: 1dd7a48e296f8941d1d15290ce710f7522c7c847 SHA-256: abeaf7179e6eec7a29d3f28b3b823431cc3c15edd7a941def12fc97a0edf7be2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers strongly indicate maliciousness, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/123?utm_term=incredible+5+point+scale+anxiety PDF link annotation
    • http://1xbet-regi.site/pmdg_747-8_v3_crack9a1e5.pdfIn PDF document text
    • http://burrrhey.tech/sutifebenoluzelilumukinuf9c0b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501380/normal_6013f58134066.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/Kggcrjg/9306724214.pdfIn PDF document text
    • https://cdn.sqhk.co/tobepeliv/QiKjhFJ/pubibodudubitudovekupux.pdfIn PDF document text
    • https://cdn.sqhk.co/mujutuzidip/ghjfgdJ/fitbit_inspire_2_bands_canada.pdfIn PDF document text
    • https://musabonaxuzu.weebly.com/uploads/1/3/2/8/132815830/8075967.pdfIn PDF document text
    • http://ctyr.ru/homograph_worksheets_for_grade_3npong.pdfIn PDF document text
    • http://huseyincanx.com/grandparents_rights_in_parfk3i.pdfIn PDF document text
    • http://mushygushysayings.com/profits_in_the_stock_market_harold_m._gartleyeepup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401538/normal_5fedd646edc0e.pdfIn PDF document text
    • http://pedalini.club/beckett_yugioh_collector_magazine1lpsd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424696/normal_6007c3406e4e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464865/normal_5fcba1b912a4f.pdfIn PDF document text
    • https://cdn.sqhk.co/noxavuris/b1L7ifL/mine_mob_clicker_rpg.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/loBgf4H/horror_amino_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/norozovijalu/29050747387.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/xapofabaxibiputorijori.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/python_format_code_integer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 5224 bytes
SHA-256: aac0027d6bd3e21599150f3d2a9910675096717e22cc2d7a12cb241350990fee
font_01_sfnt_off0001005f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005F 10628 bytes
SHA-256: 57bb497ac24efbcda89b1f7e0a41cea1d49c2ad6465e73804c9f351e95c91a37
font_02_sfnt_off000124b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B0 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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