Malicious PDF — malware analysis report

Static analysis result for SHA-256 127e956ca8c120f2…

MALICIOUS

PDF

71.5 KB Created: 2021-03-09 23:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2751b693e5adf7bb93434f5bc4697a67 SHA-1: 0f854d57aa6c72e9d41862ac370cfc6a1a57465e SHA-256: 127e956ca8c120f21faa0725e3a9e7ca0955a46ba2c8eca82ad269d3e1d097ed
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host phishing/malware content. While no scripts were explicitly extracted, the presence of external URIs and the overall structure strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/award?keyword=african+union+book+pdf PDF link annotation
    • https://cdn.sqhk.co/raxedaninaso/c3ihhFV/85231426354.pdfIn PDF document text
    • http://elerctum.org/vakamuwakimezixzsj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_6043e0981f4a5.pdfIn PDF document text
    • https://zefuriduzowav.weebly.com/uploads/1/3/0/7/130740504/pogenelev.pdfIn PDF document text
    • https://mijipunipiju.weebly.com/uploads/1/3/1/4/131455283/mimakuzuxawonokijuwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5fe60a3380931.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472491/normal_6005da1d2ac59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413967/normal_603dec6ea5563.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/dkL0hib/davepidafodopu.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/ijjRbMO/html5_drag_and_drop_not_working_on_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/xipapotug/FUHii3z/mud_bogging_trucks_4x4_for_sale.pdfIn PDF document text
    • http://supportcopyright.net/is_there_a_shortage_of_christmas_trees_this_year1ag6u.pdfIn PDF document text
    • http://getporte.xyz/bosch_tassimo_single_serve_coffee_maker_manualsfi4d.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/bekobu_xumukuj_xivefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410954/normal_601b4d06f37c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422150/normal_5ff936c3b7634.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/gN8hihA/kosodulopibapu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459175/normal_6005a9306c923.pdfIn PDF document text
    • https://sumulepali.weebly.com/uploads/1/3/4/8/134882140/wozuxoka_paworo_gototewamigo_dubupisivuken.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/kavifunaruvi/netelaxakaxojemuj.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/40368041644.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/51660910340.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/jumedaxi.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_off0000dc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC58 5132 bytes
SHA-256: 2689cf335202d743a14fa9cb01f5cda36c19d065cfe880c33d25a4f0f66b134a
font_01_sfnt_off0000eddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDF 10416 bytes
SHA-256: 98030484c6f5e89ad9ae606bdbc1bb3174065734a8568a4276765e1e1e11b707

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