Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05d854f0e91ad5c…

MALICIOUS

PDF

68.6 KB Created: 2021-02-24 16:11:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fb14434822bcef0bd3a24a2d8b7fa278 SHA-1: d91a66471282d547a4f7ba7c6f076bab8879ed4a SHA-256: f05d854f0e91ad5c442dde6016d5110e6951af325fa759f558599efb487be409
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like PDF_SEO_DISPOSABLE_LINK_FARM further supports this, indicating the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://baarspo.ru/strik?utm_term=how+to+find+power+dissipation+in+ltspice PDF link annotation
    • https://cdn.sqhk.co/zezinojox/bBShcij/irancell_charge_online.pdfIn PDF document text
    • http://kekebum.22web.org/zabexebupisesi.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/8jhbRie/92884190176.pdfIn PDF document text
    • http://excschool.ru/bufukiguz0uqv5.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/igagfig/53708681621.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/lg_soundbar_nb3530a_mounting_bracket.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/46311543345.pdfIn PDF document text
    • http://re-capital.ru/bajirao_mastani_movie_free_in_tamil1cdzm.pdfIn PDF document text
    • http://cuzinfo.ru/aadhaar_card_print_out_onlinef7rnd.pdfIn PDF document text
    • http://natur-green.fun/pro_106_scanner_simulcast4qx74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zubiluwetij.myartsonline.com/munoxatuvoxotu.pdfIn PDF document text
    • http://gusagikatu.rf.gd/98578148725.pdfIn PDF document text
    • http://woxuwepudok.rf.gd/39527217439.pdfIn PDF document text
    • http://nonulalomijowo.epizy.com/anger_management_worksheet.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/50604094837.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/22864094655.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/xodiribepoguw.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE52 5200 bytes
SHA-256: 4f9c8efc2eba97ec25a0a6901bba483a342e12981aee8cf51719f39aeb6e629d
font_01_sfnt_off0000e027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE027 10872 bytes
SHA-256: 09222f5d2d976d96506914b33742c9d44701bb3592a7a367e74148abeace1205

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