Malicious PDF — malware analysis report

Static analysis result for SHA-256 23197d2f7ebe5389…

MALICIOUS

PDF

77.0 KB Created: 2021-02-20 21:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d4123556a33442e32bc2a53929cf7c98 SHA-1: 4cfea7844462129648ce796a77448a24ec7a621c SHA-256: 23197d2f7ebe538964a676f86cea41d6d7870c08ae10255d0ee8c77f241d6fa9
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical detection score. It contains an embedded URL pointing to 'seumenha.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to a story title, aligning with social engineering tactics.

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://seumenha.ru/123?utm_term=the+elephant+vanishes+short+story PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369653/normal_5feee2373cf84.pdfIn PDF document text
    • https://meluwirukumipi.weebly.com/uploads/1/3/1/4/131483006/acaec54e10d.pdfIn PDF document text
    • http://dwatches.site/bakamidomelixuzixoxipiwnyr0u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389793/normal_5fddb83d3be5a.pdfIn PDF document text
    • https://cdn.sqhk.co/pixefavenar/Yhhe6gg/wyvern_5e_lore.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477620/normal_5fedf9c721817.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/ibHSzyU/pogelidafitu.pdfIn PDF document text
    • https://cdn.sqhk.co/jenojigise/bG0gchd/weketizunosenaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488592/normal_5fd8bcd0756f1.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxaroposa/ge2Nqlx/dreamer_horse_movie_trailer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_6023cbd34d61a.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/nv3ggn3/muvujoretupagow.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/a4igUgg/gravity_trampoline_park_hull_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/nTMiehf/homeless_life_expectancy_uk.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/tinezedu/55173335674.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/rengar_build_guide_s9.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/application_letter_format_for_govt_job.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_off0000f1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 5020 bytes
SHA-256: e0f8a6bd9434457ca853d5ea673a3349e7057430f2833227431576fcf739f3f7
font_01_sfnt_off000102fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FA 10632 bytes
SHA-256: cb8b87e7ee448efd0856a503997e54633a763fe200fd4da1025ba76a434215d3

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