Malicious PDF — malware analysis report

Static analysis result for SHA-256 735756a2abbf8340…

MALICIOUS

PDF

83.6 KB Created: 2021-04-06 06:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 05634cf37beb6a6336821a689f63e222 SHA-1: 7e04119730cd20cc8cd25b0b6fa92cf560bb4141 SHA-256: 735756a2abbf8340fb8e2e7b63b834029b457e3ecc739d070db39e9688c72333
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://zajinet.ru/strik?utm_term=sx+70+600+film', which is likely a phishing lure or a download redirector. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of external URLs and the malware detection strongly suggest a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=sx+70+600+film PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450734/normal_600c53527bd07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527747/normal_5feb0369c4f21.pdfIn PDF document text
    • http://cheatyou.site/god_answers_all_prayers_quoteseit4z.pdfIn PDF document text
    • http://wotasabe.22web.org/panutodakikewetusa.pdfIn PDF document text
    • http://idealslimitaly-official.site/finding_asymptotes_of_rational_functionss0csy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446643/normal_6064b4b9509f8.pdfIn PDF document text
    • http://vowugewekoperak.iblogger.org/86223473877.pdfIn PDF document text
    • http://datingdate.site/20638583819o4ckd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413122/normal_60481f785180f.pdfIn PDF document text
    • http://nizuxep.iblogger.org/antologia_de_cuentos_clasicos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409095/normal_602895dcd4b5c.pdfIn PDF document text
    • http://atlas-copco.su/action_truck_sales_judsonia_arrmu4d.pdfIn PDF document text
    • http://potenciy.xyz/how_to_install_printhead_hp_861043clr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/f_distribution_table_anova.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/lekotopopinonarukof.pdfIn PDF document text
    • http://gudekor.rf.gd/english_story_books_for_grade_1_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/78616190250.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/50923249551.pdfIn PDF document text
    • https://677e6977-fc43-48b2-ac81-16e478c8573b.filesusr.com/ugd/3750c2_a1b268c87ba149a6a9c69dd7146c730d.pdf?index=trueIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_92a94b812d5a485aa6b46a7b27d3e3dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pukiza/hermeneutica_biblica_henry_virkler_gratis.pdfIn PDF document text
    • http://kaxinezapur.epizy.com/2005_chevy_tahoe_z71_owners_manual.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_off0001064a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064A 4976 bytes
SHA-256: d79967a04a1b9f5b752999ac5371ee3c35bb9d9f78b916af5da02169f652bd24
font_01_sfnt_off00011743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11743 11884 bytes
SHA-256: ac0b83a7f870c816aa11fa34f98c993584a5bd73565dc43abb312908f7d95392

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