Malicious PDF — malware analysis report

Static analysis result for SHA-256 595b2064e2406826…

MALICIOUS

PDF

82.2 KB Created: 2021-06-14 12:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ce9cec7664fc67d5fa2c9497424147f SHA-1: e16c909344f73e5cb6527eb887e79b32f29a2aeb SHA-256: 595b2064e2406826a970724e8e8bfb48224c57eb73ee422d34af9df656fc9c16
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'smidgel.ru', which is likely the primary malicious destination. The document body, though heavily obfuscated, contains text fragments related to 'Calculator app hide app', suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://smidgel.ru/pbw?utm_term=calculator+app+hide+app
    • https://cdn-cms.f-static.net/uploads/4488807/normal_6044f41346462.pdf
    • https://wafodefa.weebly.com/uploads/1/3/4/4/134480145/5679593.pdf
    • https://cdn-cms.f-static.net/uploads/4365549/normal_60bb23a5323a8.pdf
    • https://static.s123-cdn-static.com/uploads/4489852/normal_5fff7c5bb30b2.pdf
    • https://cdn-cms.f-static.net/uploads/4465694/normal_5fe76f46a6869.pdf
    • https://cdn-cms.f-static.net/uploads/4370078/normal_602f8805cad88.pdf
    • https://vudujetejagug.weebly.com/uploads/1/3/4/6/134674723/3f04a137ee93f6b.pdf
    • https://cdn-cms.f-static.net/uploads/4366375/normal_60c1436e4fa2e.pdf
    • https://static.s123-cdn-static.com/uploads/4424696/normal_5fec5a01dcee4.pdf
    • https://kuwuxezito.weebly.com/uploads/1/3/6/0/136090431/gonixeloxefotuduso.pdf
    • https://static.s123-cdn-static.com/uploads/4451575/normal_5fca39ea22dfb.pdf
    • https://cdn-cms.f-static.net/uploads/4413735/normal_60c29308c9f77.pdf
    • https://static.s123-cdn-static.com/uploads/4405930/normal_5ff2232d4169f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/02146fdc-db72-4cca-a5da-08233679660f/how_to_fix_a_chest_freezer.pdf
    • http://bopelijexuf.pbworks.com/w/file/fetch/144473250/vernier_caliper_questions_and_answers.pdf
    • http://paditoxef.pbworks.com/w/file/fetch/144490509/how_do_i_permanently_activate_my_windows_8_for_free.pdf
    • http://sufizilofab.pbworks.com/w/file/fetch/144607443/how_to_estimate_building_costs.pdf
    • http://pejokawigar.pbworks.com/w/file/fetch/144860334/46552726479.pdf
    • http://garifukedako.pbworks.com/f/pathfinder_life_sciences_mcq_book.pdf
    • http://wiwedano.pbworks.com/w/file/fetch/144744519/orhan_ztrk_ruh_sal_ve_bozukluklar_13_bask.pdf
    • http://sujagajo.pbworks.com/f/zawod.pdf
    • https://uploads.strikinglycdn.com/files/44b6494f-0c02-45b9-9393-aa7bf5f5e755/31578463899.pdf
    • http://votekotokuz.pbworks.com/w/file/fetch/145231392/dogoborurajuzadanizufezo.pdf
    • https://uploads.strikinglycdn.com/files/5e543b9c-1c69-4bc1-b607-8f6311e29a2d/najem.pdf
    • http://suniger.pbworks.com/w/file/fetch/145103952/78465256559.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_off0000fa29.bin
4c688c0676da4c9c3f1d636d29496b85ed1f90b4285ee9b780884cc7de0e34ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 2960 bytes
font_01_sfnt_off00010499.bin
62ff7d8cbef0c5dd711db0478d0f1edab815229742c97677eb476950c1263379		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10499 4888 bytes
font_02_sfnt_off0001152c.bin
b5f1c5a4cbd37e655bbe83a472dca8f6d28d68dae4afba697c8fe00e97046392		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1152C 11328 bytes

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