Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d40202c81ed6751…

MALICIOUS

PDF

91.4 KB Created: 2021-03-25 15:56:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c986e69bf842589893d29ce77e72e665 SHA-1: 263268a4576fcc950b032173c31483545272330d SHA-256: 8d40202c81ed675122d6ca504e675c7f09eecdadab7f6ca598cd3f07ffdccfd7
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 that directs users to a domain associated with malicious activity, likely to deliver a secondary payload or phish for credentials. The document body, though heavily obfuscated, appears to be a lure related to software tutorials.

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://jacksth.ru/award?keyword=adobe+after+effects+cs3+tutorial+pdf
    • http://toselarasomax.iblogger.org/fadusudobodebazosivo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wuwopuwanilepi.epizy.com/basuvavawaresele.pdf
    • https://uploads.strikinglycdn.com/files/a28b4c57-ff1b-4e81-a030-85dde323aec5/what_does_operations_research_analyst_do.pdf
    • http://wiwowefitupek.epizy.com/83017882020.pdf
    • http://kumobeba.epizy.com/a_letter_love_wallpaper.pdf
    • https://f50ece36-1901-4a7b-9396-968a400df7f4.filesusr.com/ugd/3ecb95_36fb86a001ab4166bdb01160d1d9ef98.pdf?index=true
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_282cc9ba3d2043e886b8e8a73885f92a.pdf?index=true
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_cd2955e8b69645f4aa460f7b19ffa0bf.pdf?index=true
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_3810cf9bc84043fe990774cf13109e98.pdf?index=true
    • http://wanudag.rf.gd/diccionario_esencial_latino-espaol_vox.pdf
    • http://ramejepazino.rf.gd/88328131260.pdf
    • https://uploads.strikinglycdn.com/files/9722ec25-6ba4-4009-8d65-ba890673d168/fomilem.pdf
    • https://uploads.strikinglycdn.com/files/5abd6c24-160c-4753-a54c-05ff453d7ad3/bofuxusum.pdf
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_8e25b598dfe14a31ab530a9ef3e31908.pdf?index=true
    • https://e05bdd54-7536-4db1-b7ed-110d7b12163e.filesusr.com/ugd/dd5a80_ddf90ca393f64302b2d428d70b6d3103.pdf?index=true
    • http://gidozowelixije.rf.gd/23326147913.pdf
    • https://18e7ef82-5c75-44fe-ae22-4c356c2c9ce0.filesusr.com/ugd/749e61_f047cfab49e7497abd854ec54299fa5e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a492d860-7a9e-4765-abd9-a5980fa13274/98658974216.pdf
    • https://f867c6cd-7aae-4938-a634-6821dcb48262.filesusr.com/ugd/eb45fa_2e720c6bd06f4a0f9690018628edcab2.pdf?index=true
    • 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_off0001054f.bin
a4e16a73dd1bdf9325a2cf5f409f9e6ade8645f96a5f2f4e24ae614b1f9e0368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1054F 9956 bytes
font_01_sfnt_off000124b3.bin
c0309b02a8e834432d9f8d8b66da7699e25962d603cf74728442f815da5f4beb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124B3 5444 bytes
font_02_sfnt_off00013746.bin
a4ca290d0273c44e4c881966bdefd9681b6b38048b03710d738ec65899c3747e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13746 11240 bytes

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