Malicious PDF — malware analysis report

Static analysis result for SHA-256 741371e9aa747f0d…

MALICIOUS

PDF

73.1 KB Created: 2021-02-15 08:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e4885778dc0ca21722507fdeebb778b3 SHA-1: 11a94a6745a43c63fff9c4528f07fbccb8d1a575 SHA-256: 741371e9aa747f0dfba86241be81a825c0d2de7e77eb44db47854b0a7695c61e
186 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/123?utm_term=how+to+draw+cartoon+eyes+looking+up PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422133/normal_5fd10017d626e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491670/normal_5fd311891413f.pdfIn PDF document text
    • http://criticcxck.space/1511471890emhio.pdfIn PDF document text
    • https://rilawexiretik.weebly.com/uploads/1/3/4/2/134267086/joxikadegesuda-siveda.pdfIn PDF document text
    • http://busibear.com/5835471174591xyy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382772/normal_5fe8646e00ca3.pdfIn PDF document text
    • http://sodaapp.pro/nimokobunoqa73c.pdfIn PDF document text
    • http://private-channel.site/zezofaw5cje3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_5fe7f24e81049.pdfIn PDF document text
    • http://photoforce.ru/wild_shape_guided17fy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382638/normal_5ff8fc9ecf30a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417662/normal_5ffe4c5b308ca.pdfIn PDF document text
    • https://xuxijoma.weebly.com/uploads/1/3/3/9/133997678/73651c00fa07.pdfIn PDF document text
    • https://wibipujesotut.weebly.com/uploads/1/3/1/3/131398272/8559178.pdfIn PDF document text
    • http://kartaidatodemeleri.com/first_aid_supplies_listzhxpv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494147/normal_5fe254f0efd36.pdfIn PDF document text
    • https://diwowure.weebly.com/uploads/1/3/4/5/134592565/2814658.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/sinadi/fejuzoti.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_off0000e1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AE 5460 bytes
SHA-256: ca5d780dbf20bf381a69260c1ca7880feb1cebddad436ded7cdc72ca0081b487
font_01_sfnt_off0000f468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF468 10244 bytes
SHA-256: e1a3f2e796c4540dca6d8f81fd14bc96fde5656f080bc8debcbf7263d129c0a6

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