Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6eeb31af3686e74…

MALICIOUS

PDF

76.8 KB Created: 2021-04-08 01:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2168bdfabdd4881eaff6d178ef58833a SHA-1: 105a282c826629bf25d844b1e296663cf3ba10d0 SHA-256: e6eeb31af3686e74a1c9ded940c46b536898f2168e2dd9e262bcd958eb95a306
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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
  • 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://dafemum.ru/strik?utm_term=how+to+add+data+in+excel+graph PDF link annotation
    • https://cdn.sqhk.co/vorinugobol/i0jfTIt/51130556572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415524/normal_6030eb01e5679.pdfIn PDF document text
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/1905058.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/hbigUnH/best_trickshotting_map_fortnite.pdfIn PDF document text
    • https://vifatogiso.weebly.com/uploads/1/3/4/3/134316440/farebuw.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/hGhdidb/74163713297.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/4c3dff2a050.pdfIn PDF document text
    • https://lerugusenexeke.weebly.com/uploads/1/3/5/3/135317851/5011dd8e437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495402/normal_5fd66c927bcbd.pdfIn PDF document text
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/paxegabigusunij_zikufamozazuxe_lozido_wutida.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/bhjTihN/42386794213.pdfIn PDF document text
    • https://bikujezojodu.weebly.com/uploads/1/3/4/5/134587809/sedavuwiduku.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuburi/fqjdzQ8/learning_licence_application_form_online_gujarat.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/ff1293a6ef.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/d00e9ad8-ea07-40fe-80d0-4b9e3e62fae1/ruzebidetubugidomi.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/88266391649.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/hec_ras_tutorial_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/244e8cfd-c705-48b8-9c04-dff85c9d2a72/46024512337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e2883a1-640d-4fd0-9e14-e50e5873380d/sylvia_plath_poems_about_death.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138d8292-fd5f-4073-a295-a84f3aed4d89/85995916868.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/euphoria_piano_sheet_hard.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_off0000ee33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE33 5280 bytes
SHA-256: b62350524b456e69643b6db14eba3affa85a8cd1748fe8ccfafe71725bcd5b4b
font_01_sfnt_off00010034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10034 11140 bytes
SHA-256: 35e98680cb4b7f49ee76f05663f7e5e778dbaf624abecbf1c0a32d820f91ded4

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