Malicious PDF — malware analysis report

Static analysis result for SHA-256 479116b8c3eeb658…

MALICIOUS

PDF

82.7 KB Created: 2021-03-26 07:25:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 42ccd56a7b472de4125437a56f0a4350 SHA-1: 56c3c0d306a0a4a04f1e2f56764359642dba7a7f SHA-256: 479116b8c3eeb6587c0c77bc9d1f4db43714264a9ecc50f7dce9ab345355ecfc
166 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm, suggesting it's designed to redirect users to other sites. The presence of a 'cheat engine' lure and the ML classifier's high confidence score indicate malicious intent. The heuristic 'SE_SECURITY_BYPASS' also suggests the document may instruct users to disable security features, further supporting a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/123?utm_term=cheat+engine+6.+3++filehippo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421611/normal_604698688b2ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_6019f0be00723.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/gmjdshe/nixezadifexaxelepado.pdfIn PDF document text
    • https://judenebubiz.weebly.com/uploads/1/3/4/6/134656374/3041084.pdfIn PDF document text
    • http://vehicleinsusa.com/jonopowabegutonuxugiwl4lr7.pdfIn PDF document text
    • https://cdn.sqhk.co/wovenebi/k95Foij/bebivudemevobegetojo.pdfIn PDF document text
    • http://begemotiks.fun/club_princeton_columbus_picturesyfzec.pdfIn PDF document text
    • https://cdn.sqhk.co/fiduzosi/mTjdvRt/my_talking_tom_2_hacked_version.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiliziv/dgfIhf4/tudin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412891/normal_5fe0a834273c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424646/normal_6037e2c0cdb0a.pdfIn PDF document text
    • http://lotsmen.com/report_for_deletionwshhz.pdfIn PDF document text
    • https://cdn.sqhk.co/sadinuko/5cw0jeI/homescapes_level_2408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381976/normal_5fd6e79e455ca.pdfIn PDF document text
    • http://tovelksa.website/cortadora_de_cesped_manual_vs_electrica77dc5.pdfIn PDF document text
    • http://firstdoctor.xyz/bissell_little_green_proheat_pet_user_manualwlw0g.pdfIn PDF document text
    • https://bebemabuvi.weebly.com/uploads/1/3/1/4/131453051/wuzupukikowadomineb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mifavumiz.rf.gd/pentair_fns_plus_60.pdfIn PDF document text
    • http://biwipekimati.rf.gd/comment_integrer_template_html_en_wordpress.pdfIn PDF document text
    • http://xulisaj.rf.gd/futurubesanol.pdfIn PDF document text
    • http://beritoka.rf.gd/togoxalavubukesigifikesi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE85 3080 bytes
SHA-256: 8574919c7c8a9f024103958ce015253c5a24b8e646cdb5f787658918713f2b2b
font_01_sfnt_off0000f98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98D 5048 bytes
SHA-256: 8d722be3a3c2e1e024ee1d2af83186c30bc69d5d4771902989ba4b7bd2919d3a
font_02_sfnt_off00010abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABE 10636 bytes
SHA-256: b8b20c34db083e4603e2e2dae0bcaf29cc67d8a92738b2ea465fdf901901790a
font_03_sfnt_off00012ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2