Malicious PDF — malware analysis report

Static analysis result for SHA-256 24bf8cf17515fc2b…

MALICIOUS

PDF

73.5 KB Created: 2021-04-03 19:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6560ab6004691b421a6521ad23e3ba22 SHA-1: df7e7249d7ec5e7563d0d1f10363b79ed376f220 SHA-256: 24bf8cf17515fc2b4e6e94fcb86229a2500e44a34c31e399535ab3c31622820a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, appears to be related to the embedded URI's keyword.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/award?keyword=carros+de+fuego+piano+pdf
    • https://cdn.sqhk.co/kefiruge/jdhjXsV/bus_simulator_2015_apk_apkpure.pdf
    • https://static.s123-cdn-static.com/uploads/4450158/normal_5ffc1bf962350.pdf
    • https://cdn-cms.f-static.net/uploads/4426822/normal_60174fa25cbfb.pdf
    • https://cdn.sqhk.co/nukuzulu/ciiMUn6/battleheart_legacy_battlemage_build.pdf
    • https://static.s123-cdn-static.com/uploads/4446263/normal_5fed667bd0d4c.pdf
    • https://cdn.sqhk.co/dagedazi/5Gae6EL/spanish_classes_latin_american_association_atlanta.pdf
    • https://cdn-cms.f-static.net/uploads/4446774/normal_603739d0bff5f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lemujiv.epizy.com/background_png_hd_free.pdf
    • https://uploads.strikinglycdn.com/files/6aab4fd1-beed-4dd3-9243-56c13daee7eb/naxowa.pdf
    • https://uploads.strikinglycdn.com/files/526cc6ab-db2d-4ce7-890d-ade93bdb116e/sejiliberudel.pdf
    • http://powavowuzipuvu.epizy.com/34670204661.pdf
    • http://guxodolabisiruj.epizy.com/60599634296.pdf
    • https://uploads.strikinglycdn.com/files/b6785440-d368-4808-a9bb-2f45675f69d0/what_is_the_lesson_of_flowers_for_algernon.pdf
    • https://uploads.strikinglycdn.com/files/6edd7ad5-b5ae-4afd-b00f-c9ec6c7003db/how_to_fix_canon_ip2770_black_ink.pdf
    • https://uploads.strikinglycdn.com/files/84136735-7e27-4c4b-81d9-bc4bb1f2dc3c/besenogenojulifojujuked.pdf
    • https://uploads.strikinglycdn.com/files/797c2fae-4535-4c65-98da-672ff03c10f8/nagedaramoliwur.pdf
    • https://uploads.strikinglycdn.com/files/dfd2d453-a15f-4a5f-ad51-ecfc615c94ed/7936691339.pdf
    • https://uploads.strikinglycdn.com/files/41a5b976-2b0f-4d3b-9770-e1ec54087d57/101_juice_recipes_joe_cross_free.pdf
    • https://uploads.strikinglycdn.com/files/f762c649-b5e9-4731-9623-9a934982e4d3/7602440736.pdf
    • https://uploads.strikinglycdn.com/files/eb951e0e-d77f-4121-ad5e-143b00caef08/100_verbos_mas_usados_en_ingles.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_off0000e009.bin
4838b2e2803417c4d4e422d544c76b61228fb01d685746c3303e3b08922f6e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE009 5084 bytes
font_01_sfnt_off0000f164.bin
1828ea7e4f7651d1d194b385350c886b687e16e32405d78fbb0243c3abde719f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF164 11260 bytes

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