Malicious PDF — malware analysis report

Static analysis result for SHA-256 894b1531cdf7aa85…

MALICIOUS

PDF

70.0 KB Created: 2020-12-11 13:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 028a017d54050cde2a0ea6f99bcc3a70 SHA-1: 36fcc7fd2ec3192aa733a9f328a33ac8822ca6f8 SHA-256: 894b1531cdf7aa8500cd588b2ba2d469f901095b64d1a31d75b48957d9b6e30e
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/aws?utm_term=non+deductible+ira+form+8606 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376362/normal_5f8ab45144635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5fafb83525656.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486356/normal_5fcc137d74b5f.pdfIn PDF document text
    • https://rarerosedipise.weebly.com/uploads/1/3/4/8/134876587/soruluv.pdfIn PDF document text
    • https://moleresudiba.weebly.com/uploads/1/3/4/4/134447347/db18bca.pdfIn PDF document text
    • https://denutuzuno.weebly.com/uploads/1/3/4/7/134706868/c36e9ade30a45e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f9cae1636ca1.pdfIn PDF document text
    • https://jinerepesejo.weebly.com/uploads/1/3/4/5/134576949/fojozekawaxib_rejipasujepun_vademuvegi_bewirexiwofur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5fb2daad958a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458404/normal_5fd1d154d6f41.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/gofilafixu/abi_rafdi_cinta_terlarang.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe28a29b1ed03538a485db/1606297763835/kowonivamemipixor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54025405d5340f34641f1/t/5fce02936f0099009e8974ed/1607336596501/nintendo_switch_games_cyber_monday_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/68509234680.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc362cf5687f52b6b9115bf/t/5fd143b01d1a2b76830169b0/1607549872887/people_are_awesome_youtube.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_off0000d3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E4 5588 bytes
SHA-256: 21a47c96ba95e8ab6863cafd2e05ec4e67f317d07f4a23e7c8973e51e897f971
font_01_sfnt_off0000e6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D5 10696 bytes
SHA-256: 6dbb09bb8869af05aa8d466af82752a29e7d471896b034325cd8a84277b82631

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