Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ef351757632f71…

MALICIOUS

PDF

270.2 KB Created: 2021-04-07 17:35:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 653295cee1c6935cf830432c854addc5 SHA-1: 99cda63d7a8036d3f9e8fc13e90baafcbd2cbddf SHA-256: 09ef351757632f715f0edb3d112609da8dc02c439ef1979826906988d699d321
96 Risk Score

Malware Insights

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

The file is a PDF document that masquerades as a user manual for a Keurig coffee machine. It contains multiple embedded URLs, one of which, https://jacksth.ru/wix?keyword=keurig+k-cup+k3000se+owner%2527s+manual, is flagged as suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=keurig+k-cup+k3000se+owner%2527s+manual
    • http://terem.space/superconscious_mind_powera9q9t.pdf
    • http://table-wait.com/solugotu8fytm.pdf
    • http://tronreserve.online/579602279025a6rt.pdf
    • http://iglivesupportteam.com/measuring_volume_of_irregular_shaped_objects_worksheettvsj0.pdf
    • http://freud.icu/62536795639nmsf5.pdf
    • http://tixshopclub.space/how_to_search_using_imagesv2bl5.pdf
    • http://obmenkalnr.online/pumimoruxepedb8pxz.pdf
    • http://erethiztzj.space/6471433786ga1xc.pdf
    • http://twirlini.com/the_lord_of_the_rings_the_two_towers_gamey8srq.pdf
    • http://losmopaka.site/89727355637jzw6s.pdf
    • http://lbaranaydin.com/240084373361fk8u.pdf
    • http://sale50.pro/where_can_i_buy_red_heart_soft_yarnsakcq.pdf
    • http://nutesane.iblogger.org/alter_session_set_nls_date_format_mysql.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gubogur.rf.gd/lufuregapoxusuwiw.pdf
    • https://s3.amazonaws.com/dugibabafod/xelipofaju.pdf
    • https://uploads.strikinglycdn.com/files/5cffc988-34fb-430e-a3d3-60a09858bfd0/cant_open_door_on_beko_washing_machine.pdf
    • https://s3.amazonaws.com/gebukil/guzoka.pdf
    • https://uploads.strikinglycdn.com/files/8964729b-bbab-41fd-868b-12cbe96bc6a4/52333483068.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003be82.bin
1e5641bbbde6436686425691a99ff04729def049c48dad728dff36504586a433		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BE82 5552 bytes
font_01_sfnt_off0003d168.bin
a2ecf1fa6feea32c9e210623db43f57e24c57b34a244f910f54149541b5a4364		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3D168 16324 bytes
font_02_sfnt_off000404a3.bin
44d9c922acaebf0bd89bbc2f700668b039ba04d1dda10151fc3f369deea26354		 pdf-font-stream PDF embedded font (sfnt) at offset 0x404A3 16512 bytes
font_03_sfnt_off00041b1d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41B1D 4324 bytes

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