Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4ebbf062874a3a7…

MALICIOUS

PDF

70.3 KB Created: 2021-04-15 20:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2a07f19224cae5c0f0194a9cb69dcf7f SHA-1: 0b786d299239e9b8c894c6486ddeb2b0dc090257 SHA-256: b4ebbf062874a3a7a09f520156ab9fbb011d843ab604d56194e3aa0a93f39810
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a link farm and a payment redirection lure, suggesting a phishing attempt. The embedded URL `https://golowaki.ru/strik?utm_term=briggs+and+stratton+18+hp+vanguard+engine+parts` and the disposable hosting URL `http://afracheat3.xyz/tojogolodavitis227zt.pdf` are likely entry points to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://golowaki.ru/strik?utm_term=briggs+and+stratton+18+hp+vanguard+engine+parts PDF link annotation
    • http://afracheat3.xyz/tojogolodavitis227zt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479902/normal_5fe901e9c2a54.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/jfXYgjl/46460074253.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/ecx7dv5/70420524328.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/eijhejb/guxiwa.pdfIn PDF document text
    • http://helplnstagramoffice.com/jazz_2nd_edition_scott_deveaux37lpe.pdfIn PDF document text
    • http://feviziwomuta.iblogger.org/pomipuvejobifesidavarufub.pdfIn PDF document text
    • https://cdn.sqhk.co/zedazisem/jeCE5Xz/zedge_app_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_5fdb8ec43f8fc.pdfIn PDF document text
    • http://reduslimer.website/136760966734519c.pdfIn PDF document text
    • http://iglivesupportteam.com/all_trigonometric_formulas_for_class_1201bwm.pdfIn PDF document text
    • http://znohist.site/me_before_you_full_movie_free_download_moviescounterlpoht.pdfIn PDF document text
    • http://xetutut.iblogger.org/behavior_modification_free.pdfIn PDF document text
    • https://cdn.sqhk.co/sesizame/T3hbvjb/47590788038.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/gezizefefififa/josuzezos.pdfIn PDF document text
    • http://widevuwototavu.rf.gd/bogabebozuloraxopamij.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/51990548424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc0225c9-c5db-4b70-afe6-75da4327f9c2/walmart_hours_today_sunday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc85fa75-4913-4eca-a29f-6156f4f56ca9/bokudesit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5787d453-6624-468a-9a16-26c5f5cf89ef/lasigonumisekitenigarox.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/34915435911.pdfIn PDF document text
    • http://kuwubuvorij.rf.gd/vobomatip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891af936-3a88-4476-86f6-bcafa929a751/breville_smart_oven_pro_or_air.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19fda5e-6945-44c1-b4c8-3320a6a4b39c/39235090989.pdfIn PDF document text
    • http://vasizofotobobem.rf.gd/28896059802.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_off0000d3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FE 5544 bytes
SHA-256: 4bbabcb1a2b961e2bbab55a1819f5f069693c167d0535ca4a3b8a6853b27d949
font_01_sfnt_off0000e6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DF 10660 bytes
SHA-256: bfa8f6ae7e18682f54960b25cb9a7476a15b730a1cb13e8a38f3f3affe9ad4bf