Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5197184d45ba8e3…

MALICIOUS

PDF

81.2 KB Created: 2021-06-18 20:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1533400b8a1429f9acab171fda72ba9 SHA-1: 48ff54813a48a570336cf23ee7dba4585d49ab07 SHA-256: b5197184d45ba8e34ef5320928d0e5baf68f47942dbe84c450cccdc35987c109
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a domain associated with malicious activity. The document body, though heavily obfuscated, appears to be a lure related to a presentation, likely intended to trick users into visiting the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/wb?keyword=relative%20clauses%20powerpoint%20presentation
    • https://cdn-cms.f-static.net/uploads/4412909/normal_6051c71996504.pdf
    • https://cdn-cms.f-static.net/uploads/4407983/normal_600b28de60238.pdf
    • https://naletonuve.weebly.com/uploads/1/3/4/3/134381452/e1fe22e.pdf
    • https://zifupowipowiku.weebly.com/uploads/1/3/4/7/134722678/tamopodarorupud.pdf
    • https://nowitijot.weebly.com/uploads/1/3/4/7/134716658/libutatigipulaximi.pdf
    • https://cdn-cms.f-static.net/uploads/4414678/normal_6051887de6c89.pdf
    • https://cdn-cms.f-static.net/uploads/4417998/normal_6013c5d3b0aaf.pdf
    • https://cdn-cms.f-static.net/uploads/4489725/normal_6069c8e5e4ebf.pdf
    • https://zufuleruzu.weebly.com/uploads/1/3/1/6/131637307/6862578.pdf
    • https://temadugebunexi.weebly.com/uploads/1/3/1/8/131871621/303d55ca3.pdf
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/zazedegimepaza-wefog-jutofuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/0452f592-17fc-4247-adbc-a97ebea66d84/financial_markets_and_institutions_9th_edition_solutions_manual.pdf
    • https://uploads.strikinglycdn.com/files/3874297e-7e0d-4db3-818f-21d3d19c8480/call_of_cthulhu_rpg_pt_bridge.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60cbc0d4930802154a61d768/1623965908394/getoxeregawapibaperi.pdf
    • http://mefijunov.pbworks.com/w/file/fetch/144596961/ravezewozijimefo.pdf
    • http://xoxafepapesu.pbworks.com/f/tidofobofimawafazonifofu.pdf
    • http://pikalunik.pbworks.com/w/file/fetch/145281372/gemelabenarolel.pdf
    • http://sazupamufode.pbworks.com/w/file/fetch/144478827/pokemon_xy_gba_download_link.pdf
    • https://uploads.strikinglycdn.com/files/64252ccd-67f2-46f6-94b8-2394a4a01f28/how_long_does_it_take_to_row_1000_meters.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60c513544514102cb0de4abf/1623528277653/software_engineering_tenth_edition_ian_sommerville.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60c95d0ffe020a37580e9cb3/1623809296133/fetulipexiwakijaw.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60c9615f6c80327ff3ba9e38/1623810399777/iso_media_creation_tool.pdf
    • http://ririgifavem.pbworks.com/f/65900036750.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_off0000f308.bin
30ed16872e73864d36aedf29b6d5d5559fa3c80b67276e2da334b7ae21931d20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF308 4968 bytes
font_01_sfnt_off00010412.bin
dcff4ac187f841b6f52e6a51b1030cb2002eb52ec33e196fa9d32ec71ee5757f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10412 10932 bytes
font_02_sfnt_off000128eb.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128EB 4324 bytes

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