Malicious PDF — malware analysis report

Static analysis result for SHA-256 0691c1a357b1d1a9…

MALICIOUS

PDF

72.7 KB Created: 2021-01-29 17:09:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: cc9c0e4ced80e1e485e3800e6c3a1396 SHA-1: 793d09ff3352667a60c7dbadb681c495db16a9e0 SHA-256: 0691c1a357b1d1a98aa1bc47dead524b9ce2a7b6deee2035b3f39ded2b83db92
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/shook?utm_term=chess+multiplayer+offline In PDF document text
    • https://munejubulogulep.weebly.com/uploads/1/3/4/2/134266186/dupazozevig.pdfIn PDF document text
    • https://sutapupimode.weebly.com/uploads/1/3/4/6/134615637/1b36c.pdfIn PDF document text
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/3460083.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxebiseso/hgghchi/tosagenufevamejikodorozo.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/dp99bcL/tiwijogameburunumemezer.pdfIn PDF document text
    • https://rozinezo.weebly.com/uploads/1/3/1/6/131636990/menobofulevogubita.pdfIn PDF document text
    • https://mopopapepiror.weebly.com/uploads/1/3/2/7/132741339/9a2ac05.pdfIn PDF document text
    • https://xezinaruwi.weebly.com/uploads/1/3/4/4/134479948/b7377340159e.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/9YJcih3/homeplace_furniture_outlet_hubbard_or.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lisunamubeso.epizy.com/drenagem_linfatica_manual_abdominal.pdfIn PDF document text
    • http://danokob.epizy.com/gapevejiluv.pdfIn PDF document text
    • http://jopavufugas.epizy.com/46480471575.pdfIn PDF document text
    • http://fovuxux.rf.gd/fuputogivafuzenel.pdfIn PDF document text
    • http://megutid.epizy.com/animal_and_plant_cell_quiz.pdfIn PDF document text
    • http://fibalikirikoti.epizy.com/une_formation_en_alternance_traduction_anglais.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_off0000e1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E7 5148 bytes
SHA-256: fee30cdc8dccfdfc2774fc19f5b5e36a768d792bb8606bb4a877eca540af1cf3
font_01_sfnt_off0000f341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF341 10324 bytes
SHA-256: cdd0da11e98825fdc8c245abf34021a6c796b969459664014309a1383e94a59a