Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d21dc335daa122…

MALICIOUS

PDF

71.0 KB Created: 2021-02-13 19:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bc62f8c817426e40891333f712e33cb7 SHA-1: 1f8052ad55cf42206bb290a89ce790c323fb35cf SHA-256: 93d21dc335daa1229f4c6d965f49ae84a5c001ae9fe9bf6762131e5d41cdcb0b
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one primary URL pointing to a site offering a "prayer request card template free". The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO manipulation or phishing. No scripts were extracted, but the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious or scam-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=prayer+request+card+template+free PDF link annotation
    • https://cdn.sqhk.co/xuxiropuwomo/dypicje/jurassic_world_alive_wiki_dinosaurs.pdfIn PDF document text
    • https://cdn.sqhk.co/mapexovebo/jeghuFF/61537267975.pdfIn PDF document text
    • http://kefets.xyz/zekigapifirewo1ykgt.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/f4Tghhh/cout_de_gestion_d_une_sasu.pdfIn PDF document text
    • http://lerasusakibura.22web.org/fire_emblem_heroes_merge_allies_guide.pdfIn PDF document text
    • https://vezitiratad.weebly.com/uploads/1/3/1/8/131856143/29ac85d4bd26f.pdfIn PDF document text
    • https://cdn.sqhk.co/bakavaxa/gih2rhi/ice_cream_truck_for_sale_michigan.pdfIn PDF document text
    • http://nowijito.22web.org/semusenewavimanajawuduviw.pdfIn PDF document text
    • http://alteramaks.world/javujob6inzu.pdfIn PDF document text
    • https://wezunemoxojo.weebly.com/uploads/1/3/5/3/135321606/koxesuzezudu-niduvozo-kisaweded-dakaku.pdfIn PDF document text
    • http://macsk.space/project_manager_role_in_agile_methodologyuluhg.pdfIn PDF document text
    • https://gatikewud.weebly.com/uploads/1/3/4/3/134382011/1a6a8abfdc7.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/6gf6Q16/firirapisujasoxediketiju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/waduzirader/28237517119.pdfIn PDF document text
    • http://mevekanuz.epizy.com/29154495379.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/42062045152.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/arabesque_1_debussy_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/us_king_size_sheet_dimensions.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_off0000d8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DA 5528 bytes
SHA-256: 1d0fc8a080aa7a3913abbc096e2505b24f935b82fb98bdca87d59f3262b4d20b
font_01_sfnt_off0000eb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9B 10268 bytes
SHA-256: 5d333a1211101fdc8b0417d79dda6c1a0cf84ca39143d4c1127b84d2e254b4fe

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