Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd2385db2c1b348…

MALICIOUS

PDF

73.2 KB Created: 2021-03-11 06:20:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c3a254d0b5858479597d2384e1f95c49 SHA-1: c444d9b13a664e1c5beaa94e27e98d3b46b54bc4 SHA-256: 6bd2385db2c1b348671d90ed93151e82c7dbec135a858ab1eb88b879e03de76e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://jumiwimov.ru/strik?utm_term=can+you+open+carry+an+ar+15+in+virginia PDF link annotation
    • http://sebevifa.getenjoyment.net/87030782798.pdfIn PDF document text
    • http://theplafond.xyz/78730928141nphbh.pdfIn PDF document text
    • http://idealica-italiauficiale.website/honda_power_washer_motor_partsjebi4.pdfIn PDF document text
    • http://kikizuzufo.iblogger.org/89808459659.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/fazuvijukaxibujivasinupes.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/lcm_and_hcf_worksheet_for_grade_4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pamakejexo.epizy.com/anime_beelzebub_season_2.pdfIn PDF document text
    • http://zezevefo.rf.gd/wakesemamixikotide.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/fokumalusikiwizogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3707063-10e9-401c-b90d-cb5e4287bf4c/2996394662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f64807bc-b4af-4f20-88b7-e526295b28b5/88269529286.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/munowalowejolerux.pdfIn PDF document text
    • http://biponutagovom.rf.gd/belekusevinokunipudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2674643-ebca-4154-a474-c11aa404bbac/do_water_heaters_have_a_reset_button.pdfIn PDF document text
    • http://kifinuneniw.rf.gd/instagram_photos_iphone_app.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/narefumanowi.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/aace_diabetes_guidelines_2019_ppt.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_off0000e097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE097 5136 bytes
SHA-256: 29743ab2566426f65cfd0c49f578d409218d04b11ef922b2f9efab62239c8d0c
font_01_sfnt_off0000f236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF236 10992 bytes
SHA-256: 16933e2e992f8c1197236a684b84c190ee5c11fa348df828a57d9beef9b8a565

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