Malicious PDF — malware analysis report

Static analysis result for SHA-256 5052c50534730cb5…

MALICIOUS

PDF

77.9 KB Created: 2021-03-07 15:37:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae63beaef4969361c654a87ec81c68a5 SHA-1: 8034b50d16287c51769f8c31ee7a4e6ba3eddd2c SHA-256: 5052c50534730cb5fa3b6f2a7276c4ac1ea8178479ca87031c3ea04acae3398d
96 Risk Score

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, indicating a high likelihood of malicious intent. The embedded URL `https://nipisod.ru/wix?keyword=hot+mail+iniciar+sesion+correo+electronico` strongly suggests a phishing attempt, aiming to trick users into entering their email credentials. While no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to infer a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://nipisod.ru/wix?keyword=hot+mail+iniciar+sesion+correo+electronico
    • https://cdn.sqhk.co/gutemokerezo/hijQuic/bad_day_at_black_rock_imdb.pdf
    • https://cdn-cms.f-static.net/uploads/4455174/normal_601034f6e5027.pdf
    • https://cdn-cms.f-static.net/uploads/4379217/normal_6031c7c7452df.pdf
    • https://cdn.sqhk.co/nobixapo/ejgegew/faily_skater_mod_apk_latest_version.pdf
    • https://static.s123-cdn-static.com/uploads/4366366/normal_5fcefda549e3e.pdf
    • http://mitutepoka.medianewsonline.com/29478232235.pdf
    • http://desajegurake.scienceontheweb.net/gesulot.pdf
    • https://cdn.sqhk.co/xefilelo/gdhetUf/46377473099.pdf
    • https://cdn.sqhk.co/numavagoko/iiiilih/11601852511.pdf
    • https://static.s123-cdn-static.com/uploads/4413578/normal_5ff19bbcc6faa.pdf
    • https://cdn.sqhk.co/wujozuzewed/3Hibid3/steampunk_syndicate_2.pdf
    • https://cdn.sqhk.co/parabeset/wihehep/1478644485.pdf
    • https://cdn.sqhk.co/datujisukebe/Wgf4jgh/69144527877.pdf
    • https://cdn-cms.f-static.net/uploads/4425237/normal_60381b1e9e5df.pdf
    • https://cdn-cms.f-static.net/uploads/4481061/normal_5fdc5167b1b1c.pdf
    • https://static.s123-cdn-static.com/uploads/4479454/normal_60089bc41989f.pdf
    • http://derilezin.sportsontheweb.net/how_do_i_reset_my_alpine_radio.pdf
    • https://cdn.sqhk.co/kigimole/hglKJkf/74958293132.pdf
    • https://cdn.sqhk.co/zulatobi/jbhdid9/gawakedenabijatilanapame.pdf
    • https://static.s123-cdn-static.com/uploads/4490272/normal_5fe3a5ee45462.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rizivubonulej.atwebpages.com/35718427434.pdf
    • http://kenesowozowojaw.myartsonline.com/xikejebefadaboligugu.pdf
    • http://nejarisiwudu.atwebpages.com/vegetarian_foods_for_fat_loss.pdf
    • http://nosigegu.onlinewebshop.net/16340275216.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_off0000ed44.bin
ef9b273275e26bab62f8192166d104ebb451ebb5f3895b70cb76925c81af9f55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED44 4908 bytes
font_01_sfnt_off0000fdc7.bin
d9c0a6c11b05c4a851b04fea94498496aa899470d307513bb991c37a842bde18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC7 1804 bytes
font_02_sfnt_off000106a5.bin
9d46e9782955e9734fbddbaa2b0a7f09680ea777afd01f401cf300000197f176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106A5 10184 bytes

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