Malicious PDF — malware analysis report

Static analysis result for SHA-256 8944696147cc31f9…

MALICIOUS

PDF

74.4 KB Created: 2021-02-07 19:58:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a0c81b397658877d39d1b00a0736d532 SHA-1: 78506b15eb3a8537bc30414657e8f1be6ad71499 SHA-256: 8944696147cc31f9fead76770124c74b1cb69cdf25475c51903ec6145cab47d1
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a domain that appears to be part of a phishing or scam campaign, disguised with a lure related to 'Fallout 76 leather jacket meme'. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect users to this external resource, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=fallout+76+leather+jacket+meme PDF link annotation
    • https://cdn.sqhk.co/kewukapugino/dhawQ3e/solar_system_order_of_planets_mnemonic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471945/normal_5fc69194eeb6b.pdfIn PDF document text
    • https://cdn.sqhk.co/gudopokobipa/AibKjia/60506051062.pdfIn PDF document text
    • http://sunepoxuvigos.66ghz.com/bibi_ka_maqbara_video.pdfIn PDF document text
    • http://vavoferidedodif.66ghz.com/wogoseruvodolakepa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jazomavok.epizy.com/mr_baldi_game.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/77774667833.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/gipizomixifivenuwamap.pdfIn PDF document text
    • http://nabotiwufonego.epizy.com/french_extra_episode_3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/equifax_free_credit_report_request.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/wallpaper_god_hindu.pdfIn PDF document text
    • http://jegelafaxorew.rf.gd/acrilamida_toxicidad.pdfIn PDF document text
    • http://zorarizasodefa.epizy.com/lilumovisuzibevanu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD849 5192 bytes
SHA-256: 2dfb55f2b44ec1bb9c7a97d1d61e23216f68fa4279e5534e749c44bfcaf0122c
font_01_sfnt_off0000e9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C9 2860 bytes
SHA-256: b2b6fd94d1a1b29fd3ac1bfdb0c9b2bb46f12045f08034e96ffc5a7e308e268f
font_02_sfnt_off0000f5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F7 11268 bytes
SHA-256: 01655b9b82c750d67d9125f116f5d785b723681374faeb55508e2f35a50b9fc7

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