Malicious PDF — malware analysis report

Static analysis result for SHA-256 26dfe846e5277ace…

MALICIOUS

PDF

84.2 KB Created: 2020-11-11 16:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 017fc9cec9d31a243e9b9268233ef569 SHA-1: 9042e939c93bda97b1d9769561ff594919047db5 SHA-256: 26dfe846e5277acef98dc4d1fc6501117c8c9c10e838b60205529ceab1377dd0
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=kanda+shasti+kavasam+pdf PDF link annotation
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/nodelorofe_ritizolomireku_gavefava_jafilovolideke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_5f93553ccff25.pdfIn PDF document text
    • https://sijazeresivex.weebly.com/uploads/1/3/4/5/134502522/niwudekomukunej_resixo_sudame.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_5fa37721dd5d8.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/xisotuzonagep.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/4223030.pdfIn PDF document text
    • https://lorujuxivole.weebly.com/uploads/1/3/4/5/134595667/163454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f8ac052df002.pdfIn PDF document text
    • https://mabiredozex.weebly.com/uploads/1/3/4/4/134482212/c6d6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f94b175430bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a198e6d-852e-4900-b9da-a2cffa8980f4/play_five_nights_at_anime_for_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/schedule_builder_u_of_m_tc.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/4_wood_stakes_bulk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33B 5244 bytes
SHA-256: 135b353eab99707587a7861d3d9c0a56cea7198d2454e1818792d4d536e13154
font_01_sfnt_off0000f4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F3 19720 bytes
SHA-256: 41cb9d8282261c2aaa3419510f73183b7fe5b8fb903df28a471b1adad5f13442
font_02_sfnt_off00011f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F60 10880 bytes
SHA-256: 0b6cdcc225eab0b294ece9b0f6ed4db636931c321c72626afb43398cf300afd3

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