Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b7becf1af165f1…

MALICIOUS

PDF

123.5 KB Created: 2021-04-01 21:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cab89735742f008c1a54dffffb924021 SHA-1: ebc701f0e9c02a29a268d08d2863bb3a84603327 SHA-256: c6b7becf1af165f154a338a0523b51969cb0835dc169960491495b77112a2483
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a phishing page or download further malware. The document body, though heavily obfuscated, suggests a lure related to financial documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/award?keyword=company+accounts+issue+of+shares+and+debentures+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392444/normal_603ed4579f02d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_60633aad0d074.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414501/normal_601e06b1ee8e2.pdfIn PDF document text
    • http://rakadan.sportsontheweb.net/define_adverb_with_examples.pdfIn PDF document text
    • http://axacheat4.xyz/bogupazorijemaruripukih93oi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_603a166a53063.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/4254651892.pdfIn PDF document text
    • http://pumba.fun/rebetepeva4gjp.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/jojitagifuva/ambient_sound_app.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/daffodils_poem_questions_answers_icse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962ad5bb-9135-4f57-ac82-39891a43e096/36862729326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac22cd71-8800-4c23-8163-57364ec39d9d/penny_stocks_list_nse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f911985-1404-43e9-bc61-925b28e565c9/speakeasy_gym_reseda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f8894a-ca64-48d4-80cb-24fddeb15757/28574033350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89a98c9c-8e3d-4525-8844-29ffd96900ee/kupuvirizemebazipalanuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/cqc_uclh_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d80b7a6-cc28-40b7-ba00-e8bf3102b672/toshiba_voicemail_reset_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/064e9e4b-5670-4a5d-98b5-71dfde0a3889/potekodogaramavado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff29f9e-b2b2-4ca1-be38-47a867171d29/nonfiction_text_structure_examples.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19129 5512 bytes
SHA-256: 17db6dc25bad9c66dd6826a66526e788cf2cda41e9b44a38548a3ab261ba2d23
font_01_sfnt_off0001a3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3BA 11176 bytes
SHA-256: 4666046ea785518902ee9e162df5a9a39ab1ec72a8f1a21c148e8d15c4d7a70c
font_02_sfnt_off0001ca3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA3C 16220 bytes
SHA-256: 308fefec1d2698643a975af31de1e93189976f8d0ed493825f7663cbac5ccee2

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