Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e1716a999abd5d…

MALICIOUS

PDF

143.7 KB Created: 2021-02-14 22:04:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 55d140e0958ec708abc44ad63b765497 SHA-1: 47e350928c9646dba4e94ee14ce0af19287d6b75 SHA-256: a6e1716a999abd5d7ce2438046dcaacf141d42dd15ddf84b35018a69e0590d4b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wb?keyword=bhakti%20song%20pawan%20singh%20ka'. This indicates the document is designed to lure users to a potentially malicious website. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wb?keyword=bhakti%20song%20pawan%20singh%20ka In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_5fd3b10a1bc6b.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/hipHFib/1341759050.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415308/normal_5ff714d8bfa5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445871/normal_600867f26d181.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422894/normal_60036b2fb6cd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477635/normal_5ff1fceb0d275.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447253/normal_5feb165422e44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367301/normal_6002869aa342c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412573/normal_601442a347121.pdfIn PDF document text
    • https://cdn.sqhk.co/jenetuwuda/WEgcQFw/containers_wars_full_episodes.pdfIn PDF document text
    • https://cdn.sqhk.co/delobepaziw/ggH66wB/cost_of_da_approval_brisbane.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/icdCyBS/sand_excavator_truck_driving_rescue_simulator_game_download.pdfIn PDF document text
    • http://vienvozvrat.site/7503890362ps5au.pdfIn PDF document text
    • https://cdn.sqhk.co/pozedezupase/dujeY95/x_games_mega_ramp_winners.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/mhahbje/axe_alliance_vs_empire_titan_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/levuzivanu/KhgCIic/windows_10_change_taskbar_text_color.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vidomolojo.epizy.com/american_anthem_crossword_answers.pdfIn PDF document text
    • http://lowavizoviwu.epizy.com/zupuwax.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_off0001fc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC54 5156 bytes
SHA-256: 255d18817e03415100b7c226949f539d34957685075cebd0502f081ad374ace0
font_01_sfnt_off00020df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20DF7 10600 bytes
SHA-256: cc12b5ad03d5d4a7aae24e43e4f12eac5c1dbdcd03ed778ccef36a6eaffeee02

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