Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a8b5c559d89f89…

MALICIOUS

PDF

66.7 KB Created: 2021-01-09 17:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: a1e9f718889d6bd722878e2f1debfe20 SHA-1: 00e4e2d8888843754a6fe42cce13fdf980bb26f2 SHA-256: b5a8b5c559d89f8955eac3f2e1e80f2e97da6c037b5a07d2da4843117c9ef224
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/mozel?keyword=judas+priest+painkiller+instrumental+mp3+download In PDF document text
    • https://cdn.sqhk.co/xevuvuxene/Nichagd/87420601335.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480581/normal_5fded1e69275b.pdfIn PDF document text
    • https://cdn.sqhk.co/muvetowiripa/thdEBig/62810849228.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/eYwzkib/vedopawolofum.pdfIn PDF document text
    • https://xodunutejoxefis.weebly.com/uploads/1/3/4/4/134476009/dedubonotev.pdfIn PDF document text
    • https://vuzodafolo.weebly.com/uploads/1/3/4/7/134732359/lobulitinizufogixaf.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/9889394.pdfIn PDF document text
    • https://masogipu.weebly.com/uploads/1/3/1/6/131606875/8222501.pdfIn PDF document text
    • https://cdn.sqhk.co/vetesomiw/igficjj/vuvexela.pdfIn PDF document text
    • https://lifoluzasodani.weebly.com/uploads/1/3/1/4/131437418/34afa80b7f13c.pdfIn PDF document text
    • https://kiwotatuna.weebly.com/uploads/1/3/1/8/131856308/d73b3210ced1e8.pdfIn PDF document text
    • https://nitetawowi.weebly.com/uploads/1/3/5/3/135301411/xiropi_kivotizaxifez.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/hjdvihQ/torazetudarafemafumezupov.pdfIn PDF document text
    • https://cdn.sqhk.co/zekuxemelop/an9hiib/43175958706.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CC 5416 bytes
SHA-256: 4783f48e19c71612650a2414146c8d190515434841c150843a43d5b7d39b18bf
font_01_sfnt_off0000da32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA32 10344 bytes
SHA-256: 6b2b9137431c6c48c61b43731a913fa099f38e66849ec5dfc5925b2bd8004cbc

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