Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebd46d908791b08…

MALICIOUS

PDF

90.0 KB Created: 2021-06-06 13:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4a3969f05bfb6c7922cddf916d2a953 SHA-1: a647526e917b70a3fd4aaa025f53d45f3ccac32b SHA-256: 9ebd46d908791b08f69846d16b40a4faa606cdf18b3fae7f6816e053a3b1fd1a
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. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though partially garbled, suggests a lure related to technical topics to mask the malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://queure.ru/wb?keyword=ejemplos%20de%20aplicaciones%20de%20motores%20de%20corriente%20continua%20de%20imanes%20permanentes
    • https://static.s123-cdn-static.com/uploads/4393625/normal_5ff33f6b514e3.pdf
    • https://cdn-cms.f-static.net/uploads/4391001/normal_601cab8d79a87.pdf
    • https://cdn-cms.f-static.net/uploads/4408990/normal_602557593fa9b.pdf
    • https://cdn-cms.f-static.net/uploads/4417221/normal_6018344e3f04d.pdf
    • https://static.s123-cdn-static.com/uploads/4481841/normal_5fe33435d9630.pdf
    • https://static.s123-cdn-static.com/uploads/4422620/normal_5fff26d7ecf98.pdf
    • https://cdn-cms.f-static.net/uploads/4485450/normal_60407737bb1f4.pdf
    • https://static.s123-cdn-static.com/uploads/4418191/normal_60075fb464277.pdf
    • https://static.s123-cdn-static-d.com/uploads/4481402/normal_60b172b83ea1c.pdf
    • https://static.s123-cdn-static-d.com/uploads/4480743/normal_60b4f3da40ef8.pdf
    • https://static.s123-cdn-static-d.com/uploads/4371013/normal_60b3524c16ce8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/8a84cf91-3d73-45cf-9e9f-e58563551e91/what_are_the_four_components_necessary_for_photosynthesis_to_occur.pdf
    • http://nozobitativi.pbworks.com/w/file/fetch/144552750/how_to_make_study_plan_for_class_12.pdf
    • https://uploads.strikinglycdn.com/files/bb69868d-07c7-49aa-bf3e-f44714ec2db0/construction_assistant_project_manager_jobs_houston.pdf
    • https://uploads.strikinglycdn.com/files/3bb26772-d617-4148-80be-7bd53b3d57c4/51807500338.pdf
    • https://uploads.strikinglycdn.com/files/e6001481-de96-4728-bfd0-119f5d52b6fe/how_to_find_power_loss_in_transmission_lines.pdf
    • https://uploads.strikinglycdn.com/files/aefe391b-92a8-4ac7-8d6f-c8ef1b54c7bc/what_i_learned_losing_a_million_dollars_free.pdf
    • https://uploads.strikinglycdn.com/files/8b76e4ef-55c3-4f0d-bc93-f98aeffe140e/best_survivor_in_identity_v_2020.pdf
    • https://uploads.strikinglycdn.com/files/f2119e94-8c3b-40be-93f3-c45c30febf34/kejulupinatidomibokuxavol.pdf
    • http://mevuteled.pbworks.com/w/file/fetch/144618351/dungeons_and_dragons_5e_character_sheet_editable.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_off0001127e.bin
f136c046a9bd1b719fb1114863aa85168ced55e1751be047f44957a3af192702		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1127E 5136 bytes
font_01_sfnt_off000123d8.bin
1275fbb504114f210d78000d15a0d905ab577fdc6de3049687010d1286c9bd2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123D8 11520 bytes
font_02_sfnt_off00014992.bin
781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14992 4324 bytes

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