Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a804ef88f7dc0d…

MALICIOUS

PDF

75.6 KB Created: 2021-04-18 21:20:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23208ce927c42c826400341ce378ede9 SHA-1: 726c48280d62edcd245f0fa19aa151077f78935f SHA-256: 26a804ef88f7dc0d3afb5363910ead4091ff60343e851db66437abec0675a84f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to reference product names, suggesting a lure to trick users into clicking the malicious link for 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://jacksth.ru/strik?utm_term=stanley+fatmax+5m+magnetic+tape+measure
    • https://cdn-cms.f-static.net/uploads/4407780/normal_60554461c7e55.pdf
    • http://tryadasert.online/fisubafatabibizdsb6.pdf
    • https://cdn.sqhk.co/finelega/iilifGr/lavefowixegul.pdf
    • https://cdn.sqhk.co/mibemofega/hbgiwct/zalajebibenujasogutoko.pdf
    • https://cdn.sqhk.co/fovomesit/jiusIAB/business_accounting_basics_frank_wood.pdf
    • https://static.s123-cdn-static.com/uploads/4461497/normal_5fe4bc6b7173d.pdf
    • https://cdn.sqhk.co/nobukomorur/iigg9jg/marshmallow_lock_screen_prime.pdf
    • https://cdn.sqhk.co/ramawuvade/gjeV7gf/kid_city_gaming_madden_20_franchise.pdf
    • https://cdn.sqhk.co/gajamomol/hafyheC/bluestacks_setup_free_for_windows_8.pdf
    • http://wdd13.ru/25686041892e7qxa.pdf
    • http://sfr-webmail.com/vebozira29s5l.pdf
    • https://cdn.sqhk.co/wakewafo/kphgifW/uefa_champions_league_winners_list_of_all_time.pdf
    • http://nekretnine.site/consumer_capitalism_definition_economics84daf.pdf
    • https://cdn-cms.f-static.net/uploads/4457302/normal_5fd62c29da25e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fonobufusig.rf.gd/81552792268.pdf
    • https://uploads.strikinglycdn.com/files/275a332c-480f-407a-a361-747210a013d1/69682976244.pdf
    • https://uploads.strikinglycdn.com/files/8946ca3e-2aed-4f14-91f9-a8377bef5361/dodezesironej.pdf
    • https://uploads.strikinglycdn.com/files/0775a050-4f7a-426a-8abd-f274c223e850/62929199825.pdf
    • http://poxemibusap.epizy.com/33481411329.pdf
    • http://vogokobujapipam.epizy.com/lanina.pdf
    • http://mivuzovi.epizy.com/biotic_and_abiotic_interactions.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e453.bin
1ccea28cfc5e200c61405ed5d4a280bc8b5142995f07aab6c148a8984bdbb31e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE453 5732 bytes
font_01_sfnt_off0000f7e1.bin
dc583ee25d23475f3d3ec49dd4525d882f0bf38be75823cd16f813ba23d56115
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 11564 bytes