Malicious PDF — malware analysis report

Static analysis result for SHA-256 917c8ee3d1b58910…

MALICIOUS

PDF

71.9 KB Created: 2021-02-13 04:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9f7f54af5ce6d9b6e2fa51d4942ba9fb SHA-1: 3586049fa3c06178179581c4abdbafa46b5d8d5b SHA-256: 917c8ee3d1b589100864822d1dbf063dc16df2225a012bf5afc6a2ced0a93563
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=what+animal+lives+in+the+forest In PDF document text
    • https://nelejejo.weebly.com/uploads/1/3/4/8/134883178/6761023.pdfIn PDF document text
    • https://cdn.sqhk.co/kulizuxekume/njiZpw1/tusef.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/2oSLgje/43601337906.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/HeNwjjE/63886466638.pdfIn PDF document text
    • http://temppicture.xyz/skateboard_party_2tx96w.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/fJofugf/aaa_auto_insurance_customer_service.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/cookie_sheet_organizer_rackgkf76.pdfIn PDF document text
    • https://cdn.sqhk.co/kokademesuz/L2jj6Ca/game_fx_racer_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/hjifhhe/12088789086.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/8dhh4j4/mexisilov.pdfIn PDF document text
    • https://wojawiso.weebly.com/uploads/1/3/0/8/130813991/012279f3d845.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bobupugarini.epizy.com/wigirebononakor.pdfIn PDF document text
    • http://lesefapor.epizy.com/rutesarofom.pdfIn PDF document text
    • http://bemeridalazobox.epizy.com/zakivuladuze.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_off0000d901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD901 5080 bytes
SHA-256: 963bd55c1d3aeb26b413ac50c22e58d6103b3d15fb4603706c9425e61ea269d5
font_01_sfnt_off0000ea30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA30 12328 bytes
SHA-256: 223a575b87deb3d852c201db1da69af9098a5f8c27c0ffff1d11c66b59b8b4a2