Malicious PDF — malware analysis report

Static analysis result for SHA-256 a079c86731ebd431…

MALICIOUS

PDF

88.2 KB Created: 2021-04-27 13:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dd1da40d86480f8984f52a395176cf1 SHA-1: 6bce4f720839e5e689504f8160e2785be5e34ca3 SHA-256: a079c86731ebd431c7e8eafb7bc5176693708f7af09753db8232cee925e45ec9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to a book title, likely intended to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=what+warriors+book+is+after+the+last+hope
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/nenimimekesuk_xevalajepimewa.pdf
    • https://cdn.sqhk.co/nazutupim/cSNjjNa/49597562694.pdf
    • https://cdn.sqhk.co/nibijegun/bPWgh7v/23483812181.pdf
    • http://lalexejiwisejul.iblogger.org/36050451369.pdf
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/cfbfc403950.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pijularof.epizy.com/metformin_er_dosage_weight_loss.pdf
    • https://uploads.strikinglycdn.com/files/3c9824f6-3306-4f3b-97ab-4d1753d8302d/curso_ingles_basico_gratis.pdf
    • https://s3.amazonaws.com/wizidimawag/health_canada_guidelines_labelling_of_cosmetics.pdf
    • https://uploads.strikinglycdn.com/files/0d2d5338-0590-4467-9362-054f588dfc86/how_much_to_lease_a_civic_type_r.pdf
    • https://uploads.strikinglycdn.com/files/2fa1d749-244c-4eb4-8d6b-e401e08ed75f/pakenupotoselatexo.pdf
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_4cb576e82db640f29fb783ec271a0307.pdf?index=true
    • https://s3.amazonaws.com/jokotaziweluge/what_causes_water_pimples_on_your_feet.pdf
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_4779914995274277b58080e791bbdb0d.pdf?index=true
    • http://zojofat.epizy.com/angular_6_formbuilder_array.pdf
    • http://ragibotaja.epizy.com/basic_english_words_with_meaning_in_telugu.pdf
    • https://s3.amazonaws.com/tiniruru/how_to_finish_stitch_by_hand.pdf
    • https://uploads.strikinglycdn.com/files/80c1c4d3-16a6-48ae-93d9-cefefa2a2c1b/what_are_the_duties_of_a_public_safety_officer.pdf
    • https://s3.amazonaws.com/jeduzizonox/tissot_t-touch_expert_solar_gebrauchsanweisung.pdf
    • https://s3.amazonaws.com/bezorito/phonetic_symbols_keyboard_shortcuts.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118e0.bin
671bbcdcb0ac98aa4740105d6099c5afc42b2a0ad56d2d422873d0672d7f8efd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118E0 5300 bytes
font_01_sfnt_off00012af5.bin
3930eb9bb3062a55043da545e07ecbe5d124331b5d9d67a809cfb50575fd174c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF5 11400 bytes

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