Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9bff63f70909ee8…

MALICIOUS

PDF

81.5 KB Created: 2021-03-25 22:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7d159f93f5c00f7826eb8f71b6f08c7d SHA-1: 0c716e729c11ce15387bb27778ea3f5ac7549df9 SHA-256: d9bff63f70909ee8798ce3d5a20523a44143ae231b5445bbdcd0a5cf794cff82
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 0.9990

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://pelibifir.ru/wix?keyword=hgh+for+sale+on+deep+web PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490529/normal_6025e47f34960.pdfIn PDF document text
    • https://lexaxaverewazud.weebly.com/uploads/1/3/1/3/131381910/57fb8e3.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/SSifZgi/81317661577.pdfIn PDF document text
    • https://lebetazukuz.weebly.com/uploads/1/3/1/6/131606644/07205a3da04b460.pdfIn PDF document text
    • https://cdn.sqhk.co/birofinud/JgjLarl/paypal_stock_symbol.pdfIn PDF document text
    • http://rekusigixebisuk.22web.org/reticular_formation_definition_psychology.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/keneforodofonozunozovig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497109/normal_6030de8663793.pdfIn PDF document text
    • http://ririzobe.medianewsonline.com/lekubemitasodevogob.pdfIn PDF document text
    • https://tukowozurowogof.weebly.com/uploads/1/3/4/4/134440104/labupalage.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/82138085653.pdfIn PDF document text
    • https://cdn.sqhk.co/negapevu/j5gfheH/olvidar_conjugation_present_perfect.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/52661388728.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/ZYpX0aA/97533891728.pdfIn PDF document text
    • https://cdn.sqhk.co/soxobiwefili/aNJjdih/nostalgia_meaning_in_english_pronunciation.pdfIn PDF document text
    • https://bekitatabegoze.weebly.com/uploads/1/3/0/7/130775701/9371526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_605b94320a735.pdfIn PDF document text
    • https://bexatebipedo.weebly.com/uploads/1/3/4/6/134631237/lesalazulabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406216/normal_602c03741563d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447084/normal_6032e7317d3c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://juwafazorames.epizy.com/dd_4e_players_handbook_2.pdfIn PDF document text
    • http://pikididubemet.epizy.com/converter_para_autocad_gratis.pdfIn PDF document text
    • http://riniwipum.rf.gd/80714166700.pdfIn PDF document text
    • http://tojopoxirer.rf.gd/aoe_2_forgotten_empires.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FB 5156 bytes
SHA-256: 826f813d3bc445d8549e3ec009f6d59ad8a83a7c730bbba986ed94fd4ef20690
font_01_sfnt_off00010786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10786 10216 bytes
SHA-256: 2d875069bdaa8796993125c314b78e0b5e7f3d6497dabc8d4e1c711b1b8e72b8
font_02_sfnt_off00012a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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