Malicious PDF — malware analysis report

Static analysis result for SHA-256 71169b621f8975ed…

MALICIOUS

PDF

74.1 KB Created: 2021-03-03 09:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0cbc6e2f782c482d984c09857a7aa912 SHA-1: b5695c76057bfe7085696e9adf3b2a3d8d044243 SHA-256: 71169b621f8975ed9deee0cc075565c8acc5e67297b2fb6a75c0fc0fb52fb10d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://crophysi.ru/123?utm_term=lola+lago+vacaciones+al+sol+summary+english In PDF document text
    • http://levupag.22web.org/boridudosupunuvikabavu.pdfIn PDF document text
    • https://cdn.sqhk.co/dexasubu/hgdxjfi/75880065663.pdfIn PDF document text
    • http://vokotavawer.iblogger.org/85956795217.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/gwicifo/zalusagonefapobipimovak.pdfIn PDF document text
    • http://foyou.store/zilojuvedapuzovi68xcp.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/gggirJY/faliseradas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421937/normal_602f32014cf17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387430/normal_5fef1ad510768.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/jXLywrh/56188126596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405185/normal_6032e31589ae6.pdfIn PDF document text
    • https://cdn.sqhk.co/rapekerokemo/4jdc2Gt/miragine_war_2_hacked.pdfIn PDF document text
    • http://discovljzg.fun/zoxubomux4d0x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/jcr_journal_citation_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/best_always_on_display_app_for_android.pdfIn PDF document text
    • http://xegiwofune.rf.gd/accuweather_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/febesoj.pdfIn PDF document text
    • http://gumigojozupe.epizy.com/visual_brain_teasers.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/outlook_for_mac_10._13._6.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/7265077387.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_off0000deab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAB 5316 bytes
SHA-256: 706dd551734999970a47c6348dc377bc1bad9500a775503fe54d18000e85c4b2
font_01_sfnt_off0000f0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A4 13564 bytes
SHA-256: 37133173ee4a026e3b52f7df98d958c4cb0e1e83ace3e35dfce333c65201e254

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