Malicious PDF — malware analysis report

Static analysis result for SHA-256 f85a7b08c1df3fd2…

MALICIOUS

PDF

77.8 KB Created: 2021-03-18 03:23:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c426659cf03b1bc214a0f30e6082a58d SHA-1: b29be9f6be5ef907cce7f75d19e0614ff19ef1e4 SHA-256: f85a7b08c1df3fd2c8bb64ba416b1fef4bc4fc078cb6daecdae339c30392f54d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, 'jumiwimov.ru', which is likely used to host a phishing page or a secondary payload. The PDF structure itself is also flagged for duplicate object bodies, indicating potential obfuscation or malformation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=sparrow+wings+apartments
    • http://nikecortez.net/intertherm_electric_furnace_wiring_diagram_manualdznvj.pdf
    • http://tusiteguluvora.getenjoyment.net/example_of_a_central_idea_statement.pdf
    • http://fikosarodone.medianewsonline.com/let_the_right_one_in_full_movie_online_free.pdf
    • http://volalagokiva.sportsontheweb.net/astm_b117_11.pdf
    • http://creditscorefix.info/guvuruddyqkz.pdf
    • http://50offstore.pro/gifikizilagutakomufsmnmw.pdf
    • http://afracheat4.xyz/hp_5610_printer_cartridge_error_fixhviz6.pdf
    • http://realwockyc.info/cisco_router_wrt160n_v3_default_passwordfmioe.pdf
    • http://erse.xyz/bomboniere_laurea_informaticaxgofg.pdf
    • http://mbfsopg.com/25685660520hp4qe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_1678423f2c3543e88c3c21875cd2f3d1.pdf?index=true
    • http://wesatume.atwebpages.com/18066538949.pdf
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_3ccfb50d5f654b828a4f11dd64edacff.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bfeadd90-5910-47be-8b66-72cc366b11b9/easy_ukulele_songbook.pdf
    • https://s3.amazonaws.com/fonazuzixagizir/pebudonewogeledologamedob.pdf
    • https://uploads.strikinglycdn.com/files/965e5e56-557f-4419-9fac-31cb10587c83/which_cobra_radar_detector_is_the_best.pdf
    • https://uploads.strikinglycdn.com/files/4c7b9083-76a9-4671-a7ba-ca75097d28f4/32066113207.pdf
    • https://s3.amazonaws.com/zexozavo/rabuxa.pdf
    • https://s3.amazonaws.com/webipejonavuv/xuribideperikako.pdf
    • https://s3.amazonaws.com/negonanopix/christmas_tree_painting_ideas_easy.pdf
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_5f0ce68d1ac54449aad1b22a875a14fb.pdf?index=true
    • https://62dace35-232c-43a2-b3e8-6cf19ad57148.filesusr.com/ugd/42ae31_ed495d813e09443a85b829d6702d7ead.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_off0000e4f7.bin
2d11f680fe5c82530d89d6db6978a85aea1f7619b7ad5e77b6a15e0018b3c525		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 5088 bytes
font_01_sfnt_off0000f632.bin
9efe031496720ea7ee135cf3c6b19f2d10cf95054fea471184097ccbad137748		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 10908 bytes
font_02_sfnt_off00011bb5.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB5 4324 bytes

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