Malicious PDF — malware analysis report

Static analysis result for SHA-256 c87ba6eb637302fb…

MALICIOUS

PDF

81.0 KB Created: 2021-03-04 22:53:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 19295dbedf4eeeef40e571da4b449bdc SHA-1: 4a3a0648b09d534e6dcbf3d26ad3e5ef95be2d61 SHA-256: c87ba6eb637302fb6f1a746dd568cc65c6ac4e7bb3bc3daff420cc2a12a00fb4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing sites, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The embedded URLs, such as 'https://lozipotod.ru/award?keyword=how+much+does+a+dutch+rabbit+cost', likely serve as lures to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/award?keyword=how+much+does+a+dutch+rabbit+cost PDF link annotation
    • http://kugewezebuvigiw.mygamesonline.org/33687500094.pdfIn PDF document text
    • http://50offshop.pro/revolution_the_off_road_experience_llcwtxla.pdfIn PDF document text
    • https://sazojowob.weebly.com/uploads/1/3/4/3/134351878/puwuvelejotewi.pdfIn PDF document text
    • https://buderenedisam.weebly.com/uploads/1/3/5/3/135302361/5550425f67c7417.pdfIn PDF document text
    • https://fikanofuzak.weebly.com/uploads/1/3/1/4/131438747/subowimovixewo.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/94545900696.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/garmin_nuvi_2595_lm_gps.pdfIn PDF document text
    • https://buvaranugabenu.weebly.com/uploads/1/3/0/8/130873820/4880556.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/morixi.pdfIn PDF document text
    • http://drenajkrasnodar.ru/kiseki_roselia_mp37ovt8.pdfIn PDF document text
    • http://namelesssouth.xyz/vajerekadaxezaziwalipoj4sis.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/busijodosifopelefidome.pdfIn PDF document text
    • https://simokatojerosu.weebly.com/uploads/1/3/0/8/130874490/7567365.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
    • https://s3.amazonaws.com/wenobagupexekap/rozovofufute.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/muwimatode.pdfIn PDF document text
    • http://zasuwunal.myartsonline.com/11623452436.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/employment_agreement_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/jirajazilukazudi.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/sumerian_tablets_vs_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/emerson_flat_screen_tv_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/centrifugal_pump_working_animation_video.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/bitlocker_windows_7_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/messenger_video_call_for_windows_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/p_square_chop_my_money.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F6 5116 bytes
SHA-256: ae13796418681dd0338c0f48e1492de732dd071f6da210a9b7cbabb3d832a068
font_01_sfnt_off00010364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10364 10764 bytes
SHA-256: ef83fb9bf192d6e0db501ec613f8d513c0512ba34c10c6e56573c6cd5b22c2ab
font_02_sfnt_off00012827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12827 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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