Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59d5a2af47f001a…

MALICIOUS

PDF

107.0 KB Created: 2021-03-18 09:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 153d06965436ce3e04e81381ab7d6070 SHA-1: b8b43c3f5b905334811bcbda9ebca57419bbbf2b SHA-256: c59d5a2af47f001a836209197d250cbf168dc82f27a84c4e5530ad618ba4cd19
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that directs users to a website related to 'mnemonic memory techniques'. This URL is flagged as suspicious and the ML classifier and ClamAV detection strongly indicate maliciousness, likely for phishing or malware distribution. The PDF structure itself does not contain executable scripts, but the embedded URI is the primary indicator of malicious intent.

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://kuzutuzo.ru/award?keyword=mnemonic+memory+techniques+pdf
    • https://cdn-cms.f-static.net/uploads/4406228/normal_5fdbe6ca51332.pdf
    • https://cdn.sqhk.co/setewefasari/LBgf3jh/speedometer_apple_watch_complication.pdf
    • https://static.s123-cdn-static.com/uploads/4376600/normal_5fe5310cd4eac.pdf
    • https://cdn.sqhk.co/tedogegez/jicRbRY/stick_it_to_the_man_saying_meaning.pdf
    • https://cdn.sqhk.co/kitolitik/aiilPhh/febime.pdf
    • https://cdn.sqhk.co/loganidob/i21oTje/movie_night_at_home_gift_basket.pdf
    • http://kokoponabile.iblogger.org/how_to_work_out_interior_and_exterior_angles_of_a_polygon.pdf
    • https://cdn.sqhk.co/ramowejub/4nhhbha/can_you_post_hashtags_on_facebook.pdf
    • https://cdn.sqhk.co/daluzowinasu/4Qja6yI/bowokimevilidokozozokone.pdf
    • https://cdn.sqhk.co/waxubisolo/hazsehh/6869860302.pdf
    • https://cdn.sqhk.co/xezufulozuwo/3cifwjb/colony_collapse_disorder_definition_science.pdf
    • https://cdn.sqhk.co/gegenosuzun/ahcgfhd/kim_kardashian_hollywood_mod_apk_iphone.pdf
    • https://cdn.sqhk.co/pevukoza/dnji0PH/warodamujirizepazululutom.pdf
    • https://cdn.sqhk.co/goduwonon/haLKGTM/53377244050.pdf
    • https://cdn.sqhk.co/bapuwanuvadi/RGwujex/movie_night_menu_ideas.pdf
    • https://cdn.sqhk.co/wutalididow/WJYjghf/47739558256.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mefenip.epizy.com/computer_parts_diagram_worksheet.pdf
    • https://s3.amazonaws.com/fibesezati/letter_bingo_dauber_worksheets.pdf
    • http://duwimufowewis.epizy.com/pewibotipituf.pdf
    • https://s3.amazonaws.com/fizufapu/73786153810.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014396.bin
ae9616f376b01962687a6e1e18e9fb29aafb84ded21231ee89674ef454748354		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14396 5388 bytes
font_01_sfnt_off000155d6.bin
e4b09a6afe13e2e30e387119d6c4f5f0b733d2a9f7a3b0f0ba9d5774b0b7639e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155D6 16084 bytes
font_02_sfnt_off00018994.bin
15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18994 16120 bytes

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