Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2d9575ab60e099…

MALICIOUS

PDF

69.0 KB Created: 2021-02-22 12:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 99a464686cfb1abfa097ae5f5354ae84 SHA-1: f34304f28996b602bdfecb10a098a876cabb3ba2 SHA-256: eb2d9575ab60e099e95c561de3ef04da0a99c0707b28176b09d5b24676b1b2c4
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded links, many of which point to known malicious redirectors or disposable hosting, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains keywords related to search terms, further supporting the lure-based attack pattern.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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=ford+f250+owners+manual+2020 In PDF document text
    • http://nefuzixitelu.iblogger.org/eclipse_luna_32_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/Uibiljb/xawemulusul.pdfIn PDF document text
    • http://mamajan.space/which_is_better_fire_stick_or_roku_stick9k8fy.pdfIn PDF document text
    • http://liketsven.xyz/zovinafiturukuzugezizbheal.pdfIn PDF document text
    • https://redumufisinuf.weebly.com/uploads/1/3/1/6/131636648/3184444.pdfIn PDF document text
    • http://gidepel.22web.org/folk_etymology_word_formation_examples.pdfIn PDF document text
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/malumiwedetetukujude.pdfIn PDF document text
    • http://health-top.ru/ytd_video_er_website_listtflny.pdfIn PDF document text
    • http://cucoupon.info/saxativajot6j6qg.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/dotodixokoxegik.pdfIn PDF document text
    • http://lekezoreg.22web.org/gaming_music_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/ihCiajb/infection_prevention_jobs_jacksonville_fl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gujivixamiwol.rf.gd/94050918928.pdfIn PDF document text
    • http://vemevusakeke.epizy.com/sasaxabisotigopiso.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/nejonaxifosujetuguk.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_off0000d121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD121 5496 bytes
SHA-256: 36b14acfb0aff68ed6271f5c26951acae96b93764dac566e619949d8739c1364
font_01_sfnt_off0000e3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D4 10392 bytes
SHA-256: 832c2f8e88432a80606e2afb500a2440c3fdaf43344581ba2fc9cbc90870a68c

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