Malicious PDF — malware analysis report

Static analysis result for SHA-256 92bc1c3be4b12fd9…

MALICIOUS

PDF

71.7 KB Created: 2020-12-02 14:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: aaf5bc1ba746a4021616ed0c058ef69a SHA-1: 5073266cc16d9166177256dde6a17bc0141ae144 SHA-256: 92bc1c3be4b12fd96fdd8bef3cd9e68dbde6a8e27c4b1fe943dac23b9d509846
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a song download, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/aws?utm_term=a+b+c+d+dj+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385427/normal_5fa07e48d3844.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464722/normal_5fc3d76b534fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465702/normal_5fb88182bb333.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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6b183c6ccf69f356eb90/1606380314031/fox_school_games_google_sites.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1f46eaf37e3b646474a1/1606295366380/vagivuredab.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/michel_thomas_spanish_bundle.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/welutifewunew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f54bc0b-7c98-4119-bd51-9665fed9d113/wamolulak.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/bahubali_2_movie_hd_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5749e15f-fddf-4945-98d8-5e2037445b6c/fapafebepejezeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4f2ef20-be6a-43df-98a5-d23bf655db02/negefowawugusajozadosi.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/smokenator_1000_manual.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_off0000d14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14C 4516 bytes
SHA-256: 808f1f1f5c416c797adc24e665ad84b5860b6e5d5d1428c005eea1de52626c0e
font_01_sfnt_off0000e0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A3 10480 bytes
SHA-256: ef7773692c5c052336160a67deba64f0d2ee9d120e1a68b26f99ffd0d9df6582
font_02_sfnt_off00010450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10450 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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