Malicious PDF — malware analysis report

Static analysis result for SHA-256 97cca3dfe13166c5…

MALICIOUS

PDF

75.9 KB Created: 2021-03-17 17:33:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8dce45880ee721daec088e1b7a227da SHA-1: 7590d680b61a681024171761e167a18e4df33c34 SHA-256: 97cca3dfe13166c5e9aa62fe9e33ab509efb6874d9d66f5ef178ac727e147bd9
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with the primary one being 'https://baarspo.ru/award?keyword=asme+bolt+standards+pdf', suggesting a phishing or malware distribution lure. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to deliver malicious payloads.

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://baarspo.ru/award?keyword=asme+bolt+standards+pdf
    • http://gratoram.site/kenmore_elite_washer_service_manual0f8x0.pdf
    • http://rodina38.ru/admission_form_of_sainik_school_dehradunl1glk.pdf
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5fd7e2f678ca0.pdf
    • https://cdn-cms.f-static.net/uploads/4415530/normal_600fe45306127.pdf
    • https://cdn-cms.f-static.net/uploads/4503050/normal_5fd124863695f.pdf
    • http://masito.space/gizixogovosakexutoze1lv8h.pdf
    • http://pifavobiju.iblogger.org/commando_2_film_free.pdf
    • http://zonizubiro.getenjoyment.net/31978130288.pdf
    • http://raisinshub.pro/how_to_get_free_chick_fil_a_rewardsjo61a.pdf
    • https://cdn-cms.f-static.net/uploads/4485578/normal_6017f6e922a3b.pdf
    • https://cdn-cms.f-static.net/uploads/4413473/normal_60411e000d418.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bojepudadadax.atwebpages.com/occupational_health_and_safety_standards_philippines.pdf
    • https://s3.amazonaws.com/roware/33612427474.pdf
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_7bb616204e6a49a2a99883ee340abb5a.pdf?index=true
    • http://zedagemutumus.rf.gd/11449555696.pdf
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_3fb10c467b5b491f9f7e2408c7b71bdb.pdf?index=true
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_57125459d8854f928383a00a67354d64.pdf?index=true
    • http://tadufadimokoje.epizy.com/hr44_500_overheating.pdf
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_e53a8cb77eee4f5fb25945713fa1e3b0.pdf?index=true
    • https://s3.amazonaws.com/vukusa/29637273255.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_off0000ec37.bin
9f96ed2d59027258f441f739357733edff8ce12069f5065b6cc8c7b314a0efad
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC37 5316 bytes
font_01_sfnt_off0000fe28.bin
8bd3a877861822d1d1fe1f915b7cfdaeeb17bcdd3541e9de387b75f104f2c0f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE28 10740 bytes