Malicious PDF — malware analysis report

Static analysis result for SHA-256 5acdc8848b6a25b1…

MALICIOUS

PDF

69.6 KB Created: 2021-01-12 21:29:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b23c788b214897943a4e3ae41c418aca SHA-1: d0f328852cd4cfa654b4915d62ac1c7da3664634 SHA-256: 5acdc8848b6a25b1db31548979f9e52003c034704ba83f61b3b3520816aae3d5
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, with a high risk score. It contains an embedded URI pointing to 'traffnew.ru', which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URLs indicates an attempt to redirect the user to a malicious site.

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://traffnew.ru/123?utm_term=catch+the+moon+short+story PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403685/normal_5fc8c4571fba7.pdfIn PDF document text
    • https://site-1211548.mozfiles.com/files/1211548/91867436403.pdfIn PDF document text
    • https://site-1174507.mozfiles.com/files/1174507/telecharger_gratuitement_la_bible_louis_segond_en_francais.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402721/normal_5fe1f72063f68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410443/normal_5fc6430e1fea6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425727/normal_5fc4f81b58cd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416301/normal_5fefc6e5dd4a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419218/normal_5fcbaf1a62fb0.pdfIn PDF document text
    • https://site-1176426.mozfiles.com/files/1176426/35703417595.pdfIn PDF document text
    • https://site-1168500.mozfiles.com/files/1168500/bullet_echo_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/jchdhcH/vitalsource_bookshelf_app_not_working.pdfIn PDF document text
    • https://site-1171887.mozfiles.com/files/1171887/scruffy_beard_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/bQ0dhbK/vefusedofe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_5fd30c13031ec.pdfIn PDF document text
    • https://site-1174038.mozfiles.com/files/1174038/xusalujexokinigot.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
    • 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_off0000c813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC813 4872 bytes
SHA-256: 5433974ac6d91d6d639661c77459075df2e852d6307063041dbc66fe031cfe00
font_01_sfnt_off0000d872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD872 10268 bytes
SHA-256: 02d77560d31d74ae5b13dc45c7ac5fedf71301a2870bad3eb3f5d98d1d890e50
font_02_sfnt_off0000fb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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