Malicious PDF — malware analysis report

Static analysis result for SHA-256 901fab0c72422578…

MALICIOUS

PDF

114.1 KB Created: 2021-03-13 14:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d60fe4a58e50a0c1ef441050d11df31b SHA-1: 356b391eacc7b4b761214133cfd6e49d9c5e0f7e SHA-256: 901fab0c72422578f93acd586d4e93759186a28561554e77988e1d42ecebb985
184 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirectors and disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of malicious URLs points to a phishing attack designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/award?keyword=metabolism+of+toxicants+pdf In PDF document text
    • http://timecodes.net/berus6l4o9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502819/normal_6023d052c6cab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469370/normal_5fef534162d19.pdfIn PDF document text
    • http://trastqort.online/janapada_kannada_song_freeiq6aq.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/jijdpij/tip_top_roofing_siding_solar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493553/normal_5fce95e4542c4.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/jhgdQgf/wheels_on_bus_song_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454432/normal_6013eb1ca7c75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_60216c8931625.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/8whggie/2365479325.pdfIn PDF document text
    • https://cdn.sqhk.co/zenegiwowi/Upid7NS/73507282660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_600e3eb0e0912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5fd79ae3e6f40.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/NzZUqje/vertigo_treatment_medication_australia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_2d63c81ca5b244ccb5d5a9223f1a7602.pdf?index=trueIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_f1904993eedd4c85a22ba72a4953cf34.pdf?index=trueIn PDF document text
    • https://9f349447-249b-4747-956a-316fe86e371b.filesusr.com/ugd/d2b720_d88453fdd49941c0bf772e909ae89ab5.pdf?index=trueIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_3da21df3a98644c495af210aa311aa56.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AC8 5420 bytes
SHA-256: 67f6b324b51c8fd160856d311cd15c9d567b9da2c6bfea499e7ea50ad9918f29
font_01_sfnt_off00017d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D35 11664 bytes
SHA-256: 892676a2e655655ca3c54119f67f8ede31262ad2e0feff7589eb25481d482098
font_02_sfnt_off0001a51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A51B 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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