Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4137d5f826875e3…

MALICIOUS

PDF

72.6 KB Created: 2021-02-25 16:21:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 970f50b902e50a198d93baf25f67df5d SHA-1: d79928e487de23bac37f3d40f5b0b8f32f2bf056 SHA-256: d4137d5f826875e32cd5e33e786ff12ec7d990c367b286aca0ad267a448090e4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely leveraging techniques like spearphishing attachments to deliver this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=can+you+still+buy+sears+kit+homes PDF link annotation
    • https://cdn.sqhk.co/libuzewis/jahfHia/fastest_ball_in_cricket_ever_recorded.pdfIn PDF document text
    • http://pujuburebofig.iblogger.org/game_3d_tuning_apk_mod.pdfIn PDF document text
    • http://vuxokiwi.22web.org/jurigaxadelesute.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373986/normal_5ff1ccf6102e5.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/zP477jb/basket_wall_art_set.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496148/normal_6009056873d37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472793/normal_6012413a83e8f.pdfIn PDF document text
    • https://cdn.sqhk.co/mibuxedufexi/hhd9thf/dragon_armor_perk_id_skyrim.pdfIn PDF document text
    • http://zeraseb.66ghz.com/nevagivipisikezejeveloli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_6037b2215cacb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nowuzapifara.rf.gd/vidmate_app_for_windows_10_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/10631124531.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/vufomibaxekejis.pdfIn PDF document text
    • http://kozafulide.rf.gd/64781149906.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/contra_expense_account_balance_sheet.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_off0000e010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE010 5136 bytes
SHA-256: c8243dfa243cb9ec778d4c7c66c23f77987e29570163f60e0b5df36398c1aee1
font_01_sfnt_off0000f15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15F 10620 bytes
SHA-256: 57a2bd262c05920287120b5c57c55a831fe0512dec1781be2c35eec0041f87ce

Open this report in the interactive analyzer, or submit your own file for analysis.