Malicious PDF — malware analysis report

Static analysis result for SHA-256 c21fa1a9b0cfecee…

MALICIOUS

PDF

86.6 KB Created: 2021-03-25 04:12:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e8c05919c9c675cc1358b3b9a5c71e6 SHA-1: acff525a738014cec4a3e063a160a1d74e7ed29c SHA-256: c21fa1a9b0cfeceea6f4817844abb97dfb9193ce26442f4e8b3afdff927dcc33
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 URL pointing to 'jumiwimov.ru', which is likely used to redirect users to a malicious site. The document body contains obfuscated text that includes parts of the URL, suggesting an attempt to disguise its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://jumiwimov.ru/wix?keyword=inurl+php+id%253D1+school
    • https://cdn-cms.f-static.net/uploads/4467577/normal_5fd79f8311fae.pdf
    • https://jexisaguratoka.weebly.com/uploads/1/3/1/4/131409442/53c65af4f21e2.pdf
    • https://static.s123-cdn-static.com/uploads/4387233/normal_5feecd049781e.pdf
    • https://cdn-cms.f-static.net/uploads/4411491/normal_603ea83b0a094.pdf
    • https://cdn-cms.f-static.net/uploads/4372080/normal_601c95f7dfd6f.pdf
    • https://cdn-cms.f-static.net/uploads/4453885/normal_5fd2f86ae556d.pdf
    • https://leximefowa.weebly.com/uploads/1/3/2/6/132680903/2918890.pdf
    • http://sevezor.scienceontheweb.net/educational_psychology_woolfolk_free.pdf
    • https://kinumonitebira.weebly.com/uploads/1/3/4/6/134605003/a69275.pdf
    • https://cdn-cms.f-static.net/uploads/4496148/normal_60451131aa8cc.pdf
    • https://guvopizap.weebly.com/uploads/1/3/0/7/130776702/942550.pdf
    • https://static.s123-cdn-static.com/uploads/4415740/normal_5fde45b668f58.pdf
    • https://static.s123-cdn-static.com/uploads/4369907/normal_5ff3ee2ec9750.pdf
    • https://bolifalaloken.weebly.com/uploads/1/3/1/4/131438202/2583256.pdf
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/taxivemo.pdf
    • https://jabizujosewej.weebly.com/uploads/1/3/4/5/134584717/sekigozowulakekiwig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/f4b3329a-85a5-4a58-8aff-ab42018a3325/is_gluten_free_food_good_for_dogs.pdf
    • https://uploads.strikinglycdn.com/files/d6e74622-8317-44aa-a2e2-eea17bbb2ea6/718247601.pdf
    • http://pikubub.onlinewebshop.net/mga_bayani_ng_pilipinas_at_ang_kanilang_talambuhay.pdf
    • http://fufudaloxola.onlinewebshop.net/diploma_mechanical_engineering_drawing_book.pdf
    • https://uploads.strikinglycdn.com/files/6a290cd8-0173-4f07-b581-ff5546bba162/how_to_reset_pioneer_vsx-lx302.pdf
    • https://uploads.strikinglycdn.com/files/4bbf4910-eea7-4096-9fde-fd2b7d03fe8d/zijaxabow.pdf
    • https://uploads.strikinglycdn.com/files/d48b416c-4c5d-4f92-a97c-9b3f3d7291bf/84453003537.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f879.bin
ec0617e7d4b767a4f38c4993bdaaecdad4a8b4ca688b321d2bd370a6bc92076d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF879 2828 bytes
font_01_sfnt_off00010282.bin
21b4679bad4c358505600c05d047dcb73c31cc8368aaa0f7cdbc16bb26726ff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10282 4984 bytes
font_02_sfnt_off00011378.bin
4be348308594c466a4439037d30d36eb272af9a709484d56be0cb107f71c8aad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11378 11000 bytes
font_03_sfnt_off00013940.bin
5060c4e3035b937f10a8c503b7cbcea3d67c96a70492cb5b45fa355997dd3ef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13940 4696 bytes

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