Malicious PDF — malware analysis report

Static analysis result for SHA-256 60882e15c9a5438c…

MALICIOUS

PDF

81.4 KB Created: 2021-05-18 23:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b7a5f15f83b0dfc90b4bc4fa7b0996c SHA-1: 4d076ac164f45414a8836ac8a98f59688ba37f93 SHA-256: 60882e15c9a5438c48b448652d988c8cccec76a2068cd0d45a8e1e138dc02b40
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://midufefew.ru/wb?keyword=ruger%20mini%2014%20ar%2015%20magazine, is the primary indicator of compromise, likely leading to a phishing page or malware download. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest a common phishing or malware delivery vector.

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://midufefew.ru/wb?keyword=ruger%20mini%2014%20ar%2015%20magazine
    • https://cdn-cms.f-static.net/uploads/4384483/normal_6035e343d8482.pdf
    • https://cdn-cms.f-static.net/uploads/4403533/normal_60292f502452a.pdf
    • https://cdn-cms.f-static.net/uploads/4406168/normal_5fea316400973.pdf
    • https://cdn-cms.f-static.net/uploads/4493569/normal_6028199867c94.pdf
    • http://zajozin.22web.org/barron_s_sat_flashcards.pdf
    • https://cdn-cms.f-static.net/uploads/4411503/normal_606de18a752ba.pdf
    • https://cdn-cms.f-static.net/uploads/4385631/normal_602f1bbbe6234.pdf
    • https://cdn-cms.f-static.net/uploads/4379035/normal_602a8b13cb056.pdf
    • https://static.s123-cdn-static.com/uploads/4389101/normal_5fc82585df60c.pdf
    • http://kapuwapow.iblogger.org/chicago_cubs_schedule_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zugodelojuj.epizy.com/j500f_combination_file_free.pdf
    • https://uploads.strikinglycdn.com/files/c969446e-9345-40e3-8b3e-0382e63c4ba3/polaris_xplorer_400_carburetor_adjustment.pdf
    • https://uploads.strikinglycdn.com/files/5d000d0d-b3e4-46f7-8941-16c6dabaffab/47713376527.pdf
    • https://uploads.strikinglycdn.com/files/4573e2ec-f890-4c6e-bafb-66ec57691494/how_to_become_preferred_customer_in_herbalife.pdf
    • https://uploads.strikinglycdn.com/files/48e35a84-4122-4e38-aa1a-0505b10e91f6/56047344931.pdf
    • https://uploads.strikinglycdn.com/files/7d664e6e-ad6d-4a4e-86fa-fec55abe4d49/vanguard_9hp_oil_change.pdf
    • https://uploads.strikinglycdn.com/files/d86d349f-a529-4e94-b06c-d64830d17cfa/how_much_does_a_2nd_grade_teacher_make_in_texas.pdf
    • https://uploads.strikinglycdn.com/files/53a01ff9-1d64-4b9d-b819-6b282cd8e12d/nobizane.pdf
    • http://nanizezuzodujo.epizy.com/bison_the_yacc_compatible_parser_generator.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_off0000ff01.bin
bcdb8596a1ee0939d73a6840681b763a6a1ddbec7838d959550696316e915508		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF01 5116 bytes
font_01_sfnt_off0001106c.bin
339b81c471e24d581850295dd94336aeebe422028e636aa5e397c8c7d031079c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1106C 11352 bytes

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