Malicious PDF — malware analysis report

Static analysis result for SHA-256 875ac62a1130a913…

MALICIOUS

PDF

73.0 KB Created: 2021-03-03 09:52:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b94c67f638dbc7ac614b7e8bdc1810d5 SHA-1: e63ce0c02db99183c53f73305fb2ad63bb92588d SHA-256: 875ac62a1130a9133fb20d117726f7d28be371c50dba91a1e0dbb2ba452cb1c0
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'The Raisin in the Sun'. No scripts were extracted, but the PDF structure itself likely exploits a vulnerability or uses JavaScript to achieve its malicious goal.

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://fokemale.ru/123?utm_term=what+is+the+theme+of+the+raisin+in+the+sun
    • https://cdn-cms.f-static.net/uploads/4421476/normal_603b2dd5a43a5.pdf
    • https://cdn.sqhk.co/kidatufo/hdogghc/the_joker_hd_wallpapers_for_android.pdf
    • https://cdn.sqhk.co/ruselaguzoda/jdTFifU/game_center_not_opening_in_settings.pdf
    • https://cdn.sqhk.co/fuwasokeg/jhhtbgj/53912199245.pdf
    • http://legalvictory.group/nijujujalokuduwipazepelpdr8.pdf
    • https://cdn.sqhk.co/rapawaferew/ibLR1he/best_cafe_racer_helmet_and_goggles.pdf
    • https://cdn.sqhk.co/xokebuzizo/cijKigN/superhero_pixel_color_by_number_app.pdf
    • https://cdn.sqhk.co/nagigureti/igfihmI/15532368023.pdf
    • https://cdn.sqhk.co/kigowabalo/Vnjgy05/she_wants_me_dead_download_game.pdf
    • https://cdn-cms.f-static.net/uploads/4470209/normal_603acf754cf1a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/defujo/nilugamiloketesugulowiva.pdf
    • https://s3.amazonaws.com/najubu/fundamentals_of_pathology_by_husain_a_sattar_pathoma_2017_paperback__videos.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_off0000e378.bin
e41a5ec3a22dac437fea71e512bd0f8a1f5334c7e3f46edef9316ca2a677ffd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE378 4988 bytes
font_01_sfnt_off0000f44f.bin
8b4f0a3483ad786b8a398959766b03bf42d22071eed47e6c0abe87596389bd1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF44F 10240 bytes

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