Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc0993f9460892c…

MALICIOUS

PDF

95.5 KB Created: 2021-03-17 17:21:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 735888be2a4a1befe5caa64469be7e18 SHA-1: 57a8c9d7682f0db27d1b4372114546518f3126b2 SHA-256: 9bc0993f9460892cbc88a2d00e940a33c28d1728b58a324ea1b5a9ffd44b060e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a school supply list.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/wix?keyword=oakview+middle+school+supply+list
    • https://cdn-cms.f-static.net/uploads/4372377/normal_602cf3a8024e9.pdf
    • http://rapugazif.22web.org/rebitozoxijosadiz.pdf
    • https://cdn-cms.f-static.net/uploads/4491925/normal_5fe995aa9f33d.pdf
    • http://menetufebev.22web.org/box_top_collection_sheets_thanksgiving.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://warunegiluj.rf.gd/masimozijor.pdf
    • http://dawutanarav.epizy.com/construction_job_cost_excel_spreadsheet.pdf
    • https://uploads.strikinglycdn.com/files/b9cddead-abc0-4511-a55f-6a7c92483f6e/pabagimufelenozigoponudo.pdf
    • https://s3.amazonaws.com/befafuni/fintrac_guidelines_large_cash_transaction.pdf
    • https://uploads.strikinglycdn.com/files/b62707cd-af2a-4724-ad9a-92521a5f01c5/mulenemidikezojivil.pdf
    • https://uploads.strikinglycdn.com/files/d37f60f0-4e6a-4cd9-a43d-5b6ee2a14c0c/zujetugojo.pdf
    • https://uploads.strikinglycdn.com/files/b5065863-feca-4fba-b7fc-5be54b251c15/92077757227.pdf
    • https://s3.amazonaws.com/fibesezati/giresimipamevug.pdf
    • https://uploads.strikinglycdn.com/files/3546edb6-ed0c-4cb2-8dd7-a16e1baaf0cc/is_p90x_chest_and_back_a_good_workout.pdf
    • https://s3.amazonaws.com/padosumifubobo/macbeth_act_2_scene_1_soliloquy_analysis.pdf
    • https://uploads.strikinglycdn.com/files/9ef37de3-d722-4b45-b517-a1d17a191100/maytag_bravos_xl_washer_error_code_ul.pdf
    • https://uploads.strikinglycdn.com/files/c69e4219-c083-426f-b511-baf6f91f8e83/97004288974.pdf
    • https://s3.amazonaws.com/tuxexi/zulu_bible_apkpure.pdf
    • https://s3.amazonaws.com/dabatisew/how_to_cook_dried_tofu_sheets.pdf
    • https://s3.amazonaws.com/wutisigila/math-_aids._com_parallel_lines_answer_key.pdf
    • https://s3.amazonaws.com/jitimesolagun/21353862740.pdf
    • http://tulinavosubod.rf.gd/62271267334.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a79.bin
b4b0c7fa3745b6522f1361be27fc6c9f06157d438db1d2a1bbbfdca727f981f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A79 5340 bytes
font_01_sfnt_off00013cc9.bin
c261d0bd53dcd301e14f7e5e7bcd2216b133052b7c63a89343517e575a5f0a24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC9 11016 bytes
font_02_sfnt_off0001622d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1622D 4324 bytes

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