Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5285ee97525f349…

MALICIOUS

PDF

71.6 KB Created: 2021-02-16 06:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b9c504ffbd07cb0cf6d1952112251244 SHA-1: b825763f498f8d24d16af31efbba6907611dafb5 SHA-256: d5285ee97525f349732b780fb6a10db2c5ddf3421896be7ecd97f87e5c272b92
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. It contains embedded URLs, one of which, 'https://leonvi.ru/strik?utm_term=excelsior+meaning+stan+lee', is directly associated with the malicious classification. The PDF structure also indicates the presence of embedded links, suggesting a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=excelsior+meaning+stan+lee PDF link annotation
    • https://cdn.sqhk.co/zifeduwa/bih1jf2/non_pathogenic_microorganisms_list.pdfIn PDF document text
    • https://cdn.sqhk.co/juvowisire/Yjhgihb/abalone_shells_wholesale_australia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384144/normal_5febeda94f406.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/ijvghb0/gufetudiwixesomor.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/hcevhee/xuwosipizatojilutizev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387046/normal_60011fc9a83cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452372/normal_600b413ee1142.pdfIn PDF document text
    • http://natbeach.space/74985619677k06lp.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/VLurMhi/96115519754.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461525/normal_5ff18ccf0eadc.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/jcigYGH/death_road_to_canada_online_multiplayer_ps4.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/baritexovopa/biomes_o_plenty_1._14._4.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/foam_sheets_for_sale_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/tailoring_enchanting_guide_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/woxemorep.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/aquascape_game_apk.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_off0000dbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB0 5144 bytes
SHA-256: 663e1d7014e24f21e1b7de090c1ab59f1ae64c3ed3657ca92bcf609df36190fc
font_01_sfnt_off0000ed20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 10688 bytes
SHA-256: d456b6dd424d918bdf09910c861c21988b53633ef3801aed894dddd1468aff13

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