Malicious PDF — malware analysis report

Static analysis result for SHA-256 8daf0732e3260ad5…

MALICIOUS

PDF

75.3 KB Created: 2021-02-25 06:18:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3f892d3ef4d208862da3a0f327536f0c SHA-1: 1c1668b0cac369ca2cecb535a449d5382ac13632 SHA-256: 8daf0732e3260ad5fb7e218d920ef533458b273609f84f41ba774ff4b84373f1
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure strongly suggest the PDF is intended to redirect users to malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://druttle.ru/award?keyword=management+of+grief+ppt PDF link annotation
    • http://torchland.xyz/raxusosoxorowunquisv.pdfIn PDF document text
    • http://betflixguvenilirmi.com/lapudugofa740nb.pdfIn PDF document text
    • http://visionnew.xyz/zaxedemaxikudaxitiruvakom2azrq.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/ggvc1SA/gubipexukewapuv.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/86314596107.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/patiwanajemubukobop.pdfIn PDF document text
    • https://mulomaninivoxom.weebly.com/uploads/1/3/1/4/131437045/992c2.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/lowes_kitchenaid_electric_cooktop.pdfIn PDF document text
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/cbd8f41ad.pdfIn PDF document text
    • http://sodaapp.pro/child_couple_dance_videoachjv.pdfIn PDF document text
    • http://stonersfranchise.com/23720920779rq515.pdfIn PDF document text
    • http://lnstagramsecurity.net/xitadetexukumjxson.pdfIn PDF document text
    • http://idealica-it.website/3d_animated_heart_giftu292.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/lpi_linux_certification_study_guide.pdfIn PDF document text
    • http://the-job.ru/compte_de_rsultat_diffrentiel_exeruvwl5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kapirexazi.onlinewebshop.net/briggs__stratton_vanguard_14_hp_v-twin_manual.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_off0000ea47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA47 5016 bytes
SHA-256: 888ddafd4f646afcdfb3fd71bbc1b5d8377ce0af064cd58ee94fcab349ed15e0
font_01_sfnt_off0000fb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB59 10900 bytes
SHA-256: 59eb55af7272c0a2cb8e78a37133271dc42e80c8a7e7116139b48cc1aabfe020

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