Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0fbd762ee712687…

MALICIOUS

PDF

77.9 KB Created: 2021-03-31 13:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdb132bce123f1e64c89dafe94dcaca4 SHA-1: d92422d04f3d3833fa5c6a79c32991e852a59175 SHA-256: b0fbd762ee7126870161e455976ba653b9bc0e79c0469237cada2e7c85d4f1a0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Weebly and S3-hosted PDFs, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=haier+portable+washer+hlp21e+manual
    • https://burodepizojeke.weebly.com/uploads/1/3/2/6/132696233/9310564.pdf
    • https://sunozidugeb.weebly.com/uploads/1/3/4/4/134486191/7221093.pdf
    • https://cdn-cms.f-static.net/uploads/4392853/normal_6027fb2205214.pdf
    • https://jetezilim.weebly.com/uploads/1/3/0/7/130775858/24fc4ab94cea7f.pdf
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/3599039.pdf
    • https://static.s123-cdn-static.com/uploads/4499673/normal_5ffb82600d73c.pdf
    • https://cdn-cms.f-static.net/uploads/4411691/normal_604491bf3a8e6.pdf
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/4342510cb16.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kokesatodixon/katar.pdf
    • https://s3.amazonaws.com/nokiva/algebra_1_chapter_3_solving_inequalities_answers.pdf
    • https://s3.amazonaws.com/zonebon/madifusanejinorewix.pdf
    • https://s3.amazonaws.com/babuxufarizuxur/fenesopuvuvabebuk.pdf
    • https://s3.amazonaws.com/xifabilejilab/the_white_tiger_review_film.pdf
    • https://s3.amazonaws.com/feborobegibew/wazesobowemof.pdf
    • https://s3.amazonaws.com/rupatojuko/power_book_11_ghost_episode_11.pdf
    • https://s3.amazonaws.com/kulinisokakewi/murikejurawufaxivajubozul.pdf
    • https://uploads.strikinglycdn.com/files/61a98967-c286-49cc-93cf-983214bd659d/texezexez.pdf
    • https://s3.amazonaws.com/wizuluworafid/druid_of_the_land_spells.pdf
    • https://uploads.strikinglycdn.com/files/ff1b0c86-1221-43be-967d-a1d820c27ce3/2957617382.pdf
    • https://s3.amazonaws.com/bubodeliza/gezemafumugisapumon.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eef6.bin
6959b8b90888369d031b4fd0d548a3c37db1e07cb20150f7a70a5bbab45f8369		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF6 5436 bytes
font_01_sfnt_off0001015a.bin
a0204cb4096d3638bc7c54785b3e1281eb5774ad2273483b4e507a9c4e7f5557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1015A 11900 bytes

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