Malicious PDF — malware analysis report

Static analysis result for SHA-256 d612fa0d06365540…

MALICIOUS

PDF

77.2 KB Created: 2021-03-12 16:29:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 31a2428180079863a5efe7636eb465ec SHA-1: 2228e17323bab0f11da58cb60a4609fb7bd7aa2f SHA-256: d612fa0d063655403ed7013e6f3bd82cd064031a77a926053272d9f6c60d80f7
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://pelibifir.ru/strik?utm_term=troy+bilt+hedge+trimmer+attachment+lowes, which is likely used to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/strik?utm_term=troy+bilt+hedge+trimmer+attachment+lowes PDF link annotation
    • https://cdn.sqhk.co/nabokufawogo/fRieihN/consulter_points_shell_club_fidelite.pdfIn PDF document text
    • https://cdn.sqhk.co/ramidazumiko/hdhcxjj/alone_images_boy_sad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482869/normal_5ff3fd1f41c34.pdfIn PDF document text
    • https://ginufadep.weebly.com/uploads/1/3/4/6/134668932/5718950.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/1RSjahf/72530581375.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvutose/iejaQ5o/23575930029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463306/normal_5fe8da7a080c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484633/normal_603936ac7c372.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/1igjigi/pizadoxenuj.pdfIn PDF document text
    • https://lofemeraj.weebly.com/uploads/1/3/2/8/132814933/wapedu-risefatokiza-disuxesajobis-wozokav.pdfIn PDF document text
    • https://cdn.sqhk.co/dasadogiso/jbAijye/vutafevodetajurumeku.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/hjoiihd/twisted_metal_ps4_online.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/ja61nih/mud_bogging_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/ggfjeie/vezokapekul.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/hiBijdn/59810877638.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392441/normal_5fdd96ae1abc7.pdfIn PDF document text
    • https://cdn.sqhk.co/kavonalitego/y0vghjj/4354194333.pdfIn PDF document text
    • https://cdn.sqhk.co/vunalogivefu/elhajd1/bad_banks_staffel_2_stream_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/zjcicvZ/kofevupudubemejufigejanoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_6021d595eb8a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa14117-8b88-4ab9-8ad9-6126e5fd0959/50011672800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faee1828-3bd4-4e43-81bb-831192abb88c/dungeons_and_dragons_cartoon_character_stats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a3309a-f4af-4486-85ae-d0414d5af325/easy_vegetarian_indian_meal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e76cff6-aab6-45fe-9835-634d4222fa2c/manual_de_tcnicas_y_terapias_cognitivo_conductuales_uned.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_off0000edcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCC 5636 bytes
SHA-256: ae36a17bbf472c650fe73fc65e4a7d4f69050469879ca6005c8599feb9534c7f
font_01_sfnt_off000100d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D8 11344 bytes
SHA-256: 679ade4ce3252f729291283350bd84bef0a3ba2d7706b87521ea935e336808f7

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