Malicious PDF — malware analysis report

Static analysis result for SHA-256 833fcbc28c81feb5…

MALICIOUS

PDF

74.1 KB Created: 2021-02-16 08:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 69a9fc7ef686543c7260ee6e53e66de8 SHA-1: 50fa95a629299b28b6e9f140887b94b1be121488 SHA-256: 833fcbc28c81feb55f4d02979782bc8525bde15bfac9d653c5f94b976aa348dc
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a phishing site disguised as a wedding tuxedo cost inquiry. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to lead the user to a malicious external resource, likely for credential harvesting or further malware delivery.

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://baarspo.ru/123?utm_term=who+pays+for+the+tuxedos+in+a+wedding PDF link annotation
    • https://cdn.sqhk.co/vatuliwa/9jcphf2/10922993200.pdfIn PDF document text
    • https://cdn.sqhk.co/kejaxedusuk/hic2E0a/ronesukobibiki.pdfIn PDF document text
    • https://cdn.sqhk.co/feziwetesene/jiiific/raising_rank_insignia_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/wii9cwB/28053386034.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/ads9HPx/61953594851.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/iejiGFa/trick_shots_fortnite.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/eLZFTC6/dr_driving_2_game_download_old_version.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/boUjeja/remember_the_milk_review_2020.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/chinese_apps_for_editing_tiktok_videosgipf8.pdfIn PDF document text
    • https://cdn.sqhk.co/jofutagi/Ydq4tMN/41335220304.pdfIn PDF document text
    • http://palitra-cveta.ru/mr_coffee_iced_tea_maker_instructions_tm1g74ms.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/jj3hgje/airthings_wave_radon_detector_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/jh7Uhic/pikmi_pops_giant_flips_eddie_the_dog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kopisigapub/shoulder_injection_ultrasound_guided.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/livros_apocrifos_em_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/bredon_school_sixth_form.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/notofoma.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_off0000d605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD605 5428 bytes
SHA-256: 82aefb7b0d7bbb7ea865f6dab95fecf6d4d9be80e0be87af3d07b8a143cc4bb9
font_01_sfnt_off0000e89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89C 10752 bytes
SHA-256: fe4d9717a41d00133c01dc3775c23466db4fa8f97775bccd491d78b4dc29dea0
font_02_sfnt_off00010d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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