Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07ea7d5dcb89924…

MALICIOUS

PDF

89.6 KB Created: 2021-02-15 19:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 307686940c818c0a79f32da6b4dab4df SHA-1: 18c92183a7e529bd48ffa09877e27718e5c2c810 SHA-256: f07ea7d5dcb89924300d473e21797e79be13acf6c54eb46d0a214d36d8a10d1a
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to a 'Rzr 570 manual', which is likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://baarspo.ru/wix?keyword=rzr+570+manual PDF link annotation
    • https://jarosebat.weebly.com/uploads/1/3/4/6/134695718/23da8aed07.pdfIn PDF document text
    • https://xolilameforu.weebly.com/uploads/1/3/1/4/131407798/setemudeleb.pdfIn PDF document text
    • https://segapokepex.weebly.com/uploads/1/3/4/6/134649200/1831911.pdfIn PDF document text
    • http://ecoterritory.store/datacamp_r_course_answersaeuq8.pdfIn PDF document text
    • http://astrology-personal.online/kukane283c9.pdfIn PDF document text
    • http://fishing-rods2.club/teaching_mathematics_through_problem_solvingtxfeo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444123/normal_60288e1c8b77f.pdfIn PDF document text
    • http://fitnesspack.net/jobuduto8qoqu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486368/normal_6020289737f8e.pdfIn PDF document text
    • http://proita.fun/jetetexepitunoqhmub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404723/normal_5fcb0f30bf45b.pdfIn PDF document text
    • http://italia-doc.fun/letter_z_coloring_worksheetsln7hr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mezifaxura.rf.gd/92091171047.pdfIn PDF document text
    • http://nemebikox.epizy.com/emotional_intelligence_2._0_book_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/full_bass_guitar_lessons.pdfIn PDF document text
    • http://jofanemapax.epizy.com/american_heartworm_society_treatment_guidelines.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_off00011532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11532 5056 bytes
SHA-256: 289af44d3894b9437f16a8e8e0f04429f84bdec585c6b506293cd1723d2e72f3
font_01_sfnt_off00012662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12662 16112 bytes
SHA-256: f15dc29ba4e087f1ced97b6d77f62d7681ba1eae23c9ae9a930ae14796b0171d

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