Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2e7c918ede5b35…

MALICIOUS

PDF

69.6 KB Created: 2021-03-31 04:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 12405abed0c00df374bc505f90c42771 SHA-1: 422a324eb2cd4f0aee36d6f809fee62beccede7b SHA-256: 2e2e7c918ede5b359c8b6dee5ac46420763c529d177ba09a1e249bf44788ee7b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to disguise malicious links within seemingly legitimate search result content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vilenefex.ru/award?keyword=peter+roach+english+phonetics+and+phonology+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392462/normal_601b1a94ef3cc.pdfIn PDF document text
    • https://cdn.sqhk.co/gapalagabig/jihCid4/atlantic_fleet_gameplay_espanol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402964/normal_601fd603c7640.pdfIn PDF document text
    • http://duxogesubuz.22web.org/pawowewa.pdfIn PDF document text
    • https://cdn.sqhk.co/vomemubevu/jbVO8af/metav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426260/normal_5ff2d534933a0.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/giaZGjb/24104878322.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5ff8b28a87c05.pdfIn PDF document text
    • https://cdn.sqhk.co/niminililez/ejjH31G/ted_danson_whoopi_goldberg_child.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481058/normal_5fed4bd96b387.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/hgjb0jc/safexedodu.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/cb4sJek/touchdown_football_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_6044747f36ef0.pdfIn PDF document text
    • https://cdn.sqhk.co/dunokufimove/ieeGhgA/65105665019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_601d6114cfd31.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/iiseQ57/soxozuwelititat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391305/normal_5fffeb34e6bfa.pdfIn PDF document text
    • http://kevikakagax.iblogger.org/venn_diagram_powerpoint_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446646/normal_6032602ebac15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420752/normal_5fdf2030850bc.pdfIn PDF document text
    • https://cdn.sqhk.co/lijusute/bwijMhe/96797097060.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kasesapat.rf.gd/xifalobizo.pdfIn PDF document text
    • http://buxamojajowolos.rf.gd/listening_skills_colouring_worksheets.pdfIn PDF document text
    • http://kejidexod.epizy.com/jevetogijadolugof.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_off0000cc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC45 5612 bytes
SHA-256: f39c9fc3f50c0306e2647ee85074b60f8f046119c290a4867d70fdc8ab8f397d
font_01_sfnt_off0000df70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF70 12892 bytes
SHA-256: dbde0c6088997768e67a8d47c8f22049fc66fd8d81c2780f2bfb3ab8324a450e

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