Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9fbed68e9c3bac5…

MALICIOUS

PDF

76.2 KB Created: 2021-04-05 00:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8420295dc0c3c4d16f3ccb0f5ece47ef SHA-1: a6c5f4cb6ded117a567b365abbc4f4a63b1d0df8 SHA-256: e9fbed68e9c3bac59dad1eb8bede0a752c31ddab455fddeabceda1ff95707195
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to a suspicious domain, which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'Cub cadet lt1045 parts manual'. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=cub+cadet+lt1045+parts+manual
    • http://kifejuja.medianewsonline.com/vavoluxoki.pdf
    • http://zogometemo.sportsontheweb.net/libro_cerebrito_formulas.pdf
    • http://befakupamexi.iblogger.org/mibuga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://sogaviwezed.rf.gd/wanted_poster_template_blank.pdf
    • http://jewuvebasabam.rf.gd/mbbs_1st_year_books.pdf
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_bea0bfed9d96441eb91b567440d62362.pdf?index=true
    • http://pisonepegosa.myartsonline.com/45613539101.pdf
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_2326dc2c4c584809a22e2cf62817c412.pdf?index=true
    • http://sidegiri.epizy.com/97280020346.pdf
    • http://tivexedasabuxi.myartsonline.com/fur_elise_guitar_tab_fingerstyle.pdf
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_3292e9a1b2f24b4db1b2ff280bd3dd44.pdf?index=true
    • https://37dcb74a-b492-4e6c-94d7-6984b04a3d7f.filesusr.com/ugd/01eaca_3a3ced80d4bd41c193a720938b1805bb.pdf?index=true
    • http://filosoko.onlinewebshop.net/promissory_note_free_download.pdf
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_b5b055c1eedb4be2842fcff29f1b0487.pdf?index=true
    • https://s3.amazonaws.com/fedure/invensys_plc_annual_report.pdf
    • http://luvotirapanuza.rf.gd/rasidulubukiza.pdf
    • https://a50dbba5-e4fd-40cc-afa9-a45495a5accf.filesusr.com/ugd/7f929b_0d827c4c6d9b4a92b0f37d56a6c83e2d.pdf?index=true
    • https://s3.amazonaws.com/gezizefefififa/89113101711.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_off0000dddf.bin
535ab16cb8baa00b279b44b479bdf9d69a0ef94fb20d3a91e0064929b4070c88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDF 5512 bytes
font_01_sfnt_off0000f086.bin
edbefc127a9c6fa881ec26d1587b57e8fdf82d8f752b36ccb1588bab8cb60150		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF086 10412 bytes
font_02_sfnt_off00011429.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11429 4324 bytes

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