Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c126c89ecc2b3c6…

MALICIOUS

PDF

77.0 KB Created: 2021-03-18 01:11:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cd6bdfd6e78c3b7b48e15280bf37cf5b SHA-1: d0efded8f9e3d4836e50c0d6d1f5524db2d6c50d SHA-256: 3c126c89ecc2b3c6848b86d26df179403acf7d4acb42b6065eb9120269b15683
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, one of which, 'https://resalured.ru/strik?utm_term=logitech+g900+chaos+spectrum+price+in+india', is flagged as a potential phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/strik?utm_term=logitech+g900+chaos+spectrum+price+in+india PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371786/normal_603b3aad995de.pdfIn PDF document text
    • https://cdn.sqhk.co/pinepopowig/ajgeaje/color_island_kitchen_cabinets_paint.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/fisher_paykel_fridge_freezer_reviews.pdfIn PDF document text
    • https://vorebalulu.weebly.com/uploads/1/3/5/9/135962534/gulesaxipozanod-bopimojapoboge-barid-guxifovigof.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/hchchbD/space_force_uniform_ideas.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/5ed22931eafed6.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/how_to_use_oxy_acetylene_torch_for_cutting.pdfIn PDF document text
    • http://momarivido.mypressonline.com/xajuvutufesizawexesavo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_603c1ee05441c.pdfIn PDF document text
    • http://werojati.getenjoyment.net/baldurs_gate_dark_alliance_ps2_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/Cidohbp/ziremu.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/agency_problem_in_corporate_governance.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383792/normal_600046b20ef30.pdfIn PDF document text
    • https://cdn.sqhk.co/lafixafif/jbidhfT/funda_para_agua_huawei_p30_pro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481993/normal_603b30b19ba1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_7e343e4a39b9438da1f59e31acefdd13.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujixus/31771924354.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/paradoxo_de_bootstrap.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_8fab778e25294171bc4778989d20d778.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zesotat/helping_verbs_in_english_grammar.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/act_220_ghana.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/cyber_hunter_apk_latest_version.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_off0000ed98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED98 5692 bytes
SHA-256: f9616bd476ec1f30cbea0c0d65725c9d5003d55e9bf5425d13dc54a8a5c1c6c2
font_01_sfnt_off000100d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D0 11052 bytes
SHA-256: d6d546646083152c604988f53467ee5a6fdb2295fb38c7457b15e43f1fb8bd71

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