Malicious PDF — malware analysis report

Static analysis result for SHA-256 3131bb955e68a69d…

MALICIOUS

PDF

82.9 KB Created: 2021-05-10 10:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 74f12d7f9a757f065527c2981804eb5c SHA-1: af5b9b68899a2d0a555366dc72f377f20eede836 SHA-256: 3131bb955e68a69db9e08b189e626ad02d2773e80ae4b5b921cff0c13340e94a
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 suspicious domain, likely as part of a phishing or scam attempt. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to the embedded URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=beats+solo+3+wireless+charging PDF link annotation
    • http://jonebosu.mywebcommunity.org/suzefurerodukadofapo.pdfIn PDF document text
    • http://huseyincanx.com/locus_of_control_test_mind_toolsl71zc.pdfIn PDF document text
    • http://sandwichhq.club/besides_hydrogen_and_oxygen_what_are_the_most_abundant_chemicals_in_seawater9r56c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407795/normal_6041bf6962b67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_6043ed5d8f701.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479932/normal_5ff9c57a7ee37.pdfIn PDF document text
    • http://reduslim-eu.site/84840316529md5y3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_604888f52956c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383300/normal_5fd64e7074f86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_603f9670d1403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384145/normal_602ece6286b0f.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/rabureku.pdfIn PDF document text
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/CopyrightIn PDF document text
    • http://www.typoland.com/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fibesezati/sword_art_online_anime_list.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/59689893710.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/vakutudozalevo.pdfIn PDF document text
    • http://matimok.epizy.com/access_bars_book.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/living_with_earth_an_introduction_to_environmental_geology.pdfIn PDF document text
    • http://pupowelepidojek.onlinewebshop.net/english_speaking_lessons_for_beginners.pdfIn PDF document text
    • http://fuwutowamig.myartsonline.com/18053390169.pdfIn PDF document text
    • http://nadurajamewe.epizy.com/rafotatawejopefunekifosot.pdfIn PDF document text
    • http://lixanixuzuki.rf.gd/50375664217.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_off0000e8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 6168 bytes
SHA-256: d841e6ee9fc5f8d88f1d94419f2a0f587508a927e8deb92e2b18ca34c352e48a
font_01_sfnt_off0000f850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF850 5364 bytes
SHA-256: fdd406ef21184a0ff7d1f0de8ace38a4fc8e754953af188d231cd3b06fe3df39
font_02_sfnt_off00010a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9F 23108 bytes
SHA-256: b27651be686ccf7277a58a6602d0ca5181e9b1801b63f101b070c1e913ad17bb

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