Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd48c90f269b5aef…

MALICIOUS

PDF

75.6 KB Created: 2021-06-08 11:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 78f8589948a3701ba23b1a0ba3dfc0fe SHA-1: ca85e666b960bc1765d83e4e95d2d8db39fcc2fc SHA-256: dd48c90f269b5aefa412e4165bd4b9ddc5410b8f757a8aa4fd23914d0f4dcea8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://oniceh.ru/pbw?utm_term=full+body+scan+app+download PDF link annotation
    • https://nokojuponamipi.weebly.com/uploads/1/3/4/8/134891784/subowir.pdfIn PDF document text
    • https://demijogukif.weebly.com/uploads/1/3/1/3/131382539/fajejukam_gewegobev_papilivoxemipe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424026/normal_5fd2294b3df13.pdfIn PDF document text
    • https://rijifupipi.weebly.com/uploads/1/3/1/4/131453414/2209258.pdfIn PDF document text
    • https://kesozawowoguza.weebly.com/uploads/1/3/5/3/135310598/nosonolufawiruwiluz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425909/normal_60bd5cf45f12a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457305/normal_601af3cb4986f.pdfIn PDF document text
    • https://nifanepuram.weebly.com/uploads/1/3/4/7/134700908/a2c568c50c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444098/normal_600a266fc6565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_606dc96ea4acd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476941/normal_5ff16bcd1a92e.pdfIn PDF document text
    • https://mezonojasu.weebly.com/uploads/1/3/4/6/134639114/57c7cbf30.pdfIn PDF document text
    • https://rifitozimolumi.weebly.com/uploads/1/3/4/6/134667823/2475273.pdfIn PDF document text
    • https://xefigokilevugez.weebly.com/uploads/1/3/5/2/135299251/tekasube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500895/normal_604dc98aa2c34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0d082cf-9b85-413a-a91e-f975655017d3/butterball_xl_electric_turkey_fryer_manual.pdfIn PDF document text
    • http://vugufosenene.pbworks.com/w/file/fetch/144618510/zimugumatagevonikev.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144427815/shadow_work_writing_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8cbf653-217b-4048-9d86-ef8fad38e2ef/44801468299.pdfIn PDF document text
    • http://zudilazo.pbworks.com/w/file/fetch/144509190/cbt_worksheets_for_separation_anxiety.pdfIn PDF document text
    • http://labidan.pbworks.com/f/how_to_write_a_meeting_invitation_email_sample.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_off0000eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 5260 bytes
SHA-256: 9e9134a3fc08fd98741ccc5e206f6f1e5a9dba5f8788e0c2266cadfc164f1f27
font_01_sfnt_off0000fd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD29 10580 bytes
SHA-256: c7db2d035296f4c698a4fedf4b748b1d71cf431fc52628340599c772b5e83514

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