Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc4c47ec4db5ae3…

MALICIOUS

PDF

127.2 KB Created: 2021-04-03 13:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbc0d9414d4f2689f85d158a9bb652fe SHA-1: 2be55d6b1ee8978a177259a934c005dc298d833a SHA-256: 0bc4c47ec4db5ae358dcb749217c16d9282820f4515d6aedee755e67b7d6a8c5
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, specifically as a phishing trojan. It contains an embedded URL pointing to a resource that is presented as a programming manual, which is a common lure for phishing attacks. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=ge+fanuc+series+90+30+programming+manual
    • https://cdn.sqhk.co/sakupiraf/TjjjezM/crazy_taxi_game_free_download_apk.pdf
    • http://mon-compte-cmb.best/monster_warlord_evolution_materialsek1v5.pdf
    • https://cdn.sqhk.co/fodexuxefeba/iajiZ6V/78690712482.pdf
    • http://badgesverified.com/29980812903r9j0h.pdf
    • https://cdn.sqhk.co/sogunixe/jifgggg/wekib.pdf
    • http://zowedikeseku.iblogger.org/datiguxib.pdf
    • https://cdn.sqhk.co/tokafumotebi/gfIkhhf/20645671567.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wanalovum/sheet_metal_gauge_chart_to_mm.pdf
    • http://vefetoj.epizy.com/36020556932.pdf
    • http://rinafuladimuk.epizy.com/the_laburnum_top_extra_questions_and_answers.pdf
    • http://tivapatovike.epizy.com/zasit.pdf
    • https://s3.amazonaws.com/wupagivoz/57489571793.pdf
    • http://baginafega.epizy.com/download_aadhaar_card_file.pdf
    • https://s3.amazonaws.com/xujitezu/1535436943.pdf
    • https://s3.amazonaws.com/muwemivumazulax/15601818795.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b34c.bin
4ff6707f991ecf809b4fd08f9a72cd922e20852fdd9bcf2847155b05d5c0b9b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B34C 5828 bytes
font_01_sfnt_off0001c70a.bin
c3771c3f66a97a00e55fa3c9f5f52ad9c5f9516fbcbf23714afa201409173855		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C70A 11872 bytes

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