Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2379577f0300e94…

MALICIOUS

PDF

60.2 KB Created: 2021-02-13 12:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e32e8550575485f51e97f71c6c80d269 SHA-1: a5a6b7ab793ac96536a1dbc981d72d6de4580204 SHA-256: b2379577f0300e94412a14a4df055e7327901bb9f37b00b7f5f9c461f4acf891
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 phishing or trojan threat. It contains an embedded URI pointing to 'https://jacksth.ru/123?utm_term=rocking+horse+winner+summary+prezi', which is likely a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or malware delivery.

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://jacksth.ru/123?utm_term=rocking+horse+winner+summary+prezi PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387702/normal_600184d588321.pdfIn PDF document text
    • http://kamini33.ru/pivulanikarumizawosubobg8fi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378843/normal_6002051f7f7c9.pdfIn PDF document text
    • http://yozi.store/budowozolxni31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_6026c5304fe74.pdfIn PDF document text
    • http://ru-payment.casa/dovapimifezoi53d5.pdfIn PDF document text
    • http://interbank.link/android_game_app_development_softwarenllb6.pdfIn PDF document text
    • http://qwertyujg.xyz/sing_cube_karaoke_machinen1fgw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454543/normal_60112a31ebcbb.pdfIn PDF document text
    • http://ellmax-site.xyz/xexajamu2dpac.pdfIn PDF document text
    • http://bupro.asia/bear_city_full_movie04pm2.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/jobavo/bodoni_72_oldstyle_book_font.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/23784528878.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/quran_arabic_to_english_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/appointment_letter_sample_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/82234194351.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/49455824549.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB229 5632 bytes
SHA-256: 82760d4bfe1587869c15403356daeb8739bdc39aa4eaa85062d60a0650ee5a6c
font_01_sfnt_off0000c554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC554 8932 bytes
SHA-256: 78aabbaa72b6442c2bec4a09c96a51e83fc7e2d09cebb7e4dfb81667018e9304

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