Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d340d7467f2276a…

MALICIOUS

PDF

77.5 KB Created: 2021-05-01 22:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7c19cc0992db731b5f53f3739bdd254c SHA-1: 09ddaeb8aefa105dc0826464ed77320ae3f4c00b SHA-256: 9d340d7467f2276a2fd07ddb69058971c31c375616f56896d6c1ec62553e2f68
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. ClamAV and ML heuristics also flagged this PDF as malicious, specifically identifying it as a phishing or trojan variant. The presence of embedded URLs and the overall structure suggest an attempt to redirect the user to a malicious site for further exploitation.

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 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://xezojetit.ru/strik?utm_term=realtek+hd+audio+manager+not+working+with+headphones PDF link annotation
    • http://topcreditscore.info/longman_toefl_preparation_testjn5wv.pdfIn PDF document text
    • https://wimowago.weebly.com/uploads/1/3/0/7/130775393/tebewade.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/iiiRIig/xbox_game_streaming_preview_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/vabolepibe/ggwigwk/voodoo_magic_trick_coin.pdfIn PDF document text
    • http://lighterusb24.site/two_steps_from_hell_discography_downop48h.pdfIn PDF document text
    • http://oneitstore.info/57835903946m4r5k.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/AVjdjjP/lubojizim.pdfIn PDF document text
    • https://kusikulovaledif.weebly.com/uploads/1/3/1/6/131606813/9159ac0ff59.pdfIn PDF document text
    • http://wonnaturila.space/bomixujepewejepatetejuwpzuv9.pdfIn PDF document text
    • https://lojamagimom.weebly.com/uploads/1/3/0/9/130969840/81041.pdfIn PDF document text
    • https://bekitatabegoze.weebly.com/uploads/1/3/0/7/130775701/60a4aecd333.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/lomuper/4229605251.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/car_games_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/95697269751.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/both_either_neither_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/reading_strategies_for_struggling_high_school_students.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/saitek_x52_pro_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/dulelewuroduzovokoname.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_off0000ed83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED83 5536 bytes
SHA-256: 7fddbb2fd8bfe8ad0bcb622791d03eb6b8da864944c84e6dd90a8b17ef787bcb
font_01_sfnt_off0001003c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003C 11780 bytes
SHA-256: 4a83a44c1cd970fa4c6cfbba64f2450f334cd4067a932918ce3dc9f55df36da9

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