Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95e6151ef7dd87f…

MALICIOUS

PDF

73.3 KB Created: 2021-03-22 17:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4fce4bbebbd2b7393e1530164c893909 SHA-1: e7b001df74946eacfba431a55b1e9acbf46d189d SHA-256: a95e6151ef7dd87fd68cb45899aa8279ebea316c6d6e38c490c8e5c51208eeaf
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 0.9998

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://dafemum.ru/123?utm_term=ballade+pour+adeline+piano+sheet+richard+clayderman PDF link annotation
    • https://polopiwej.weebly.com/uploads/1/3/4/3/134353222/sibepebiwe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420906/normal_600026fb45178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454672/normal_6021074186937.pdfIn PDF document text
    • https://xowazusutimu.weebly.com/uploads/1/3/4/8/134880561/9771147.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403557/normal_5fe567f25984e.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/can_i_get_premiere_pro_for_freeiy6h9.pdfIn PDF document text
    • http://remontnatali.ru/how_to_setup_ipega_controller_on_androidpiz9j.pdfIn PDF document text
    • https://zasosefudasu.weebly.com/uploads/1/3/1/8/131856937/3977501.pdfIn PDF document text
    • https://vefonero.weebly.com/uploads/1/3/1/0/131070196/74c9a.pdfIn PDF document text
    • https://fegopamaxu.weebly.com/uploads/1/3/4/8/134896151/zijozexobo.pdfIn PDF document text
    • https://zumonula.weebly.com/uploads/1/3/5/3/135323502/893354c.pdfIn PDF document text
    • https://zakosolegim.weebly.com/uploads/1/3/5/3/135337695/peguzomalez_vabelabopun_gelazozinos_vedexejemagik.pdfIn PDF document text
    • https://tanuroxej.weebly.com/uploads/1/3/4/1/134131309/9403694.pdfIn PDF document text
    • http://pedron.fun/a_dolls_house_quotes2zgf5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakakumiwizexoj.epizy.com/64312949603.pdfIn PDF document text
    • http://pokezuturev.rf.gd/nogipisafam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/027f67f6-1bee-4408-b825-230c48497e3d/how_much_does_college_cost_in_the_game_of_life.pdfIn PDF document text
    • http://suxivivuvadife.rf.gd/71497368433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7df087a1-954b-4259-9f85-aa0ae93527d2/vubakadozawirimufigemok.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_off0000dde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE4 5464 bytes
SHA-256: 2bb9338607961e0b50aa24190efcffdb2184b12d0efba252ac6ed6b4314c37ca
font_01_sfnt_off0000f058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 11756 bytes
SHA-256: c331881aefd877d1adbd83013e922eb83afe54cd54f5cec2957c69808c7f8ea5

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