Malicious PDF — malware analysis report

Static analysis result for SHA-256 96cf5e3a17732124…

MALICIOUS

PDF

68.9 KB Created: 2021-02-21 06:01:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f5d78339ab2ca355669a17e2b22acd8 SHA-1: b1b6396f9bb292a3f7efe2e3d9f5a4815ed092fe SHA-256: 96cf5e3a17732124c5403b4b01dc73e6cd2d7526360cc9ad8582dd8286a02305
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a lure for downloading an "apk" file, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of the external URI and the nature of the detection strongly indicate a malicious intent to trick the user into downloading a potentially harmful application.

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/wix?keyword=call+blocker+apk
    • https://cdn-cms.f-static.net/uploads/4450746/normal_601877051286d.pdf
    • https://static.s123-cdn-static.com/uploads/4369653/normal_5fca7507dd7d7.pdf
    • https://cdn-cms.f-static.net/uploads/4462730/normal_600ada3ee11ad.pdf
    • https://cdn-cms.f-static.net/uploads/4458634/normal_5fda6d13010b5.pdf
    • https://static.s123-cdn-static.com/uploads/4443578/normal_5ff0a89341bb1.pdf
    • https://cdn-cms.f-static.net/uploads/4489414/normal_5fe7514cded81.pdf
    • https://static.s123-cdn-static.com/uploads/4418000/normal_5ffca98b5ac36.pdf
    • http://kozijadeji.22web.org/broomwood_primary_school_uniform.pdf
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5fd2eef4793f9.pdf
    • https://static.s123-cdn-static.com/uploads/4403808/normal_5fcd56b759add.pdf
    • https://cdn-cms.f-static.net/uploads/4426688/normal_600f22c5e0970.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/towutoginadivu/50251080528.pdf
    • http://burerekel.rf.gd/chainsmokers_paris_lyrics.pdf
    • http://rivapuremamoge.epizy.com/muridududanujixukokonuvif.pdf
    • http://daxotumolurotaw.rf.gd/shake_shack_burger_nutritional_information.pdf
    • http://pidejekakej.epizy.com/car_game_apk_file.pdf
    • https://s3.amazonaws.com/pazatuv/35584647412.pdf
    • http://nipesuvaz.epizy.com/triceps_pushdown_proper_form.pdf
    • https://s3.amazonaws.com/debiwelof/72116745685.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c52e.bin
28f0574ffa1dbb654d6a23a980464867f12222df1033ebfaad6f10ea021f4542
pdf-font-stream PDF embedded font (sfnt) at offset 0xC52E 4532 bytes
font_01_sfnt_off0000d49c.bin
8ab8293b46348fae5a8d861394589e33ef03f721d74ff5d45a1e4d6e5524391c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD49C 10504 bytes
font_02_sfnt_off0000f884.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xF884 4324 bytes