Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e64d3cbd0b175e6…

MALICIOUS

PDF

78.6 KB Created: 2021-03-16 17:12:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e2ebfec040ccced3d4aef53b8d4fd80d SHA-1: 1b8a428ba9a96584f43028e7ed1a32a8fe78b0dd SHA-256: 5e64d3cbd0b175e671497bddcbb93db2fc2c2261493926bad076b0236a4c5149
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://leonvi.ru/123?utm_term=4-+4+factoring+quadratic+expressions+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499653/normal_60479ecb33e79.pdfIn PDF document text
    • http://verapubudal.22web.org/tecnica_de_administracion_de_medicamentos_via_intramuscular.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393204/normal_60199fb70830f.pdfIn PDF document text
    • http://topchambre.xyz/maytag_front_load_washer_disassemblyc5qkc.pdfIn PDF document text
    • http://usesol.xyz/feruvivujuzulnfg0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477620/normal_603296bbdf9b6.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/88143035551e8fym.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/16311677922bh0a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478133/normal_5fd7f218aa26c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490141/normal_5ff36f381d283.pdfIn PDF document text
    • http://akb54.ru/an_inspector_calls_last_scenecizhk.pdfIn PDF document text
    • http://remontlegko.info/wovaresireapdpc.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/efac8510-ba94-4d05-b034-d63201c1bb0a/how_to_set_up_an_appointment_at_the_dmv_online_florida.pdfIn PDF document text
    • http://kivekogifix.epizy.com/what_are_the_4_types_of_informative_speeches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c23d93-11fb-40ce-8a18-797f5c3c330a/the_culture_map_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23124d8a-6656-46c8-aedd-d8239e8d53d6/bivatesug.pdfIn PDF document text
    • http://lenixad.epizy.com/bipemawuvutemugitexoma.pdfIn PDF document text
    • http://bibonajemag.epizy.com/how_to_calibrate_ph_meter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec7e5b72-b9e9-4b2c-9e3a-c86fc6571be0/votowegenalizozuvunom.pdfIn PDF document text
    • http://fuverojipu.rf.gd/flexible_dieting_lifestyle_pizza_recipe.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_off0000f221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF221 5768 bytes
SHA-256: 7a398d9b77ddf23983a0c26c9828fa8aa82de73226eff8b9ebc1e6d5c869ce31
font_01_sfnt_off000105f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F7 11332 bytes
SHA-256: 4872da2d867503fe04d4e9af2da30b747681a6c2bcfb2984d090bf7aa2988672

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