Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebd77bfb58b41df…

MALICIOUS

PDF

99.2 KB Created: 2021-04-16 02:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cdd8fce8a91548b742c6325420130aed SHA-1: 7966dc5eae245c34d5c0214fd350b4865b1ce260 SHA-256: 8ebd77bfb58b41df28f185f6243f05ebb1a7c4cf33e7838d46a59d0ce9436a66
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, appears to contain keywords related to sales, reinforcing the lure tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://fokemale.ru/strik?utm_term=boatswain+mate+lanyard+for+sale PDF link annotation
    • https://cdn.sqhk.co/givifevulo/iWtQZhh/rebozawepijafoj.pdfIn PDF document text
    • http://vojemodipu.sportsontheweb.net/76975592290.pdfIn PDF document text
    • http://chatik85939775.fun/radawumakewusodpb3a.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/fulawemaxewawexiliro.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/52144332479.pdfIn PDF document text
    • http://leledup.mypressonline.com/simone_de_beauvoir_portugues.pdfIn PDF document text
    • http://discount50it.pro/harry_potter_hardcover_set_books_1-7wpm0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369794/normal_5fe41d29e9f24.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/vtgj73j/fluoroscopically_guided_lumbar_epidural_injection.pdfIn PDF document text
    • http://gixapovunugu.getenjoyment.net/berenice_de_edgar_allan_poe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376103/normal_600417d7c80af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_60418a4b30d9e.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/how_to_blur_picture_in_paint_netdqdc3.pdfIn PDF document text
    • http://sokobumoxagug.scienceontheweb.net/21913832443.pdfIn PDF document text
    • http://majikok.mygamesonline.org/88388723948.pdfIn PDF document text
    • http://livecopyrightverification.com/wugodulijixolopa4vzmz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469641/normal_606e2fe4632db.pdfIn PDF document text
    • http://zoxodur.sportsontheweb.net/kopowemegizanixizo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369173/normal_6000fac79e551.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/d35Fkyb/mibememuponerufaxalemeve.pdfIn PDF document text
    • https://cdn.sqhk.co/rudugebakivo/geididh/79680012592.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/72e7cde1-7bc8-43a0-8ae8-d2ef202783b3/481130650.pdfIn PDF document text
    • http://rixibedi.onlinewebshop.net/giroviba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8d19ed1-fcd1-461f-b77e-8bcf2bda9f28/24556221873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e868ad8-dd04-4797-8dcc-10d0255d7a92/first_alert_smoke_and_carbon_monoxide_alarm_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbce2d0a-f38e-4bef-b654-5ede997e726e/jagedu.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_off00014236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14236 5296 bytes
SHA-256: bdbc8824782f5deb88076f5411d619b0af3b01cc7fb051bb1e252eb5dbdfd46e
font_01_sfnt_off00015439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15439 12480 bytes
SHA-256: 644e77e597e6a79927428d9558f3a160c302f9bcb731bd81797edacb3dd1f5ac

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