Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d1567af82b4046…

MALICIOUS

PDF

109.4 KB Created: 2021-03-31 02:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0dd4bbfb202bc446060c8646fe00195e SHA-1: 80f40d42de4c2102a89192872b8a9f6410c1b0d8 SHA-256: b0d1567af82b4046a96a2f5eeff992baf4ea365cac0b268244793449032d3045
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, and is flagged as a link farm and potentially phishing-related by heuristics. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://nipisod.ru/123?utm_term=brennans+wholegrain+bread+nutritional+information PDF link annotation
    • http://sopugepibimel.mypressonline.com/182132235.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/what_is_the_workplace_culture2dt7y.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/clinical_pharmacy_and_therapeutics_mcqs.pdfIn PDF document text
    • http://domen3.club/dell_u2711_release_dateb2vgm.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/5th_grade_common_core_math_standards_checklist.pdfIn PDF document text
    • http://kazotapojiwi.mywebcommunity.org/3717202090.pdfIn PDF document text
    • http://nekretnine.site/narewifeworisasozekenuxc3r1o.pdfIn PDF document text
    • http://luchdobro.site/how_much_cost_to_fix_air_conditioner_in_cark2gk4.pdfIn PDF document text
    • http://devlp.design/formal_dresses_australia_saleqdsnz.pdfIn PDF document text
    • http://cz-nitrof.website/ap_calculus_ab_practice_exam_2018c8arp.pdfIn PDF document text
    • http://bristol-yalta.run/encuentros_maravillosos_answers_captulo_39bav8.pdfIn PDF document text
    • http://sunny-web.ru/robin_hood_1938_film_locationsqr1zm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/11f2fe91-7cb2-4064-906c-5954fc3e8778/tapagisip.pdfIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_b05dd47cfd7e4b56bf5053d671e13f18.pdf?index=trueIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_7eab5d8137b8449b9352357b3b72d945.pdf?index=trueIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_bfb664ceef894462955dde58e7fdb7ff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/36750f15-67e5-4e6c-a70e-6a0183029686/what_is_the_true_story_behind_hansel_and_gretel.pdfIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_780be09120cf448c8c8c0af70f23686e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/99257ed2-d5eb-4029-afbc-0549efa143ca/49549565251.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/10354044083.pdfIn PDF document text
    • https://7fd9f749-07b0-48f8-ad51-68075edef824.filesusr.com/ugd/197648_443423d18b7947659f22f0bffb0334c9.pdf?index=trueIn PDF document text
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_9a17c63e850a482eaa5667d2e5004329.pdf?index=trueIn PDF document text
    • https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_595d0e86c593419b8864b1cf4b22fdf0.pdf?index=trueIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_1438d6b4416744b59afd57468472e162.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a88fbc80-baee-4de1-9a84-b3ccee43c724/what_is_a_kenworth_glider_kit.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_off00016c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C0B 5600 bytes
SHA-256: 2125d76b8fbc5cc2797e0cf9e548083a4f21eff6ae2f6991d7d4ca48656d5069
font_01_sfnt_off00017efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EFE 11440 bytes
SHA-256: c563fa4b76bb7f9d2a2ccf9ccc1658300e193a1862cdc62e8dea8e9493f9b549