Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9bd4db37872ddbc…

MALICIOUS

PDF

78.4 KB Created: 2021-03-19 17:23:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 022095df6d72e717257c1efc71c9d97e SHA-1: 7ae410829f1cbb9c4773e4a3adf3b7299c85b762 SHA-256: a9bd4db37872ddbcb0ffd2d81a5385796333fc40301e75fc7f1858ae2091e5c7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to resume templates, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=20+years+experience+resume+template
    • https://cdn-cms.f-static.net/uploads/4472753/normal_601972cd28887.pdf
    • http://xexejidabame.22web.org/5_types_of_text_structure_video.pdf
    • https://cdn-cms.f-static.net/uploads/4378618/normal_6040f31c1738e.pdf
    • http://creditscoreusa.info/vaporwave_city_wallpaperxv4l6.pdf
    • http://my-favshopg.online/difference_between_imperialism_and_colonialismuljwa.pdf
    • https://cdn-cms.f-static.net/uploads/4503279/normal_5fd795da40441.pdf
    • http://chempion.coffee/66446540631bk0ac.pdf
    • http://fly-drive.online/avengers_script_wikil7jvw.pdf
    • http://macsk.space/61760417032a70mt.pdf
    • https://cdn-cms.f-static.net/uploads/4410216/normal_5fe876f50eae0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_4c1d0ab17954431aa2ebda48e33b1735.pdf?index=true
    • http://pemisikozawefa.epizy.com/samsung_scx_3405_scan_to_pc.pdf
    • http://wifapig.epizy.com/ausentismo_laboral.pdf
    • https://uploads.strikinglycdn.com/files/c6066d63-89a7-4cb1-80d1-c1aeb9906ac5/luketafibila.pdf
    • http://wedofisirix.epizy.com/khan_academy_answers_6th_grade_math.pdf
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_dada8e5f28a24ae6a8474a25635df53e.pdf?index=true
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_8d3f8a2509d0411d9ce6ab481c605ac2.pdf?index=true
    • http://gateguka.epizy.com/97854939060.pdf
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_df97cd280f9f4aeea9a57aa952645ca4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e36f266d-5ba3-44a3-a521-3f0915880b4a/marshall_mg30cfx_review.pdf
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_033f76029574408da6ad31499ccbf094.pdf?index=true
    • 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_off0000f1e8.bin
0a3e48017e5536f4b237619b81a5d014296edfc2c0e41088cdf896f4c9e084bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E8 5428 bytes
font_01_sfnt_off00010453.bin
e43b9998843cd080c548d9f273ab178019b356370d20ecde821aebded08cdea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10453 11700 bytes

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