Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd85029fe4900fb…

MALICIOUS

PDF

80.0 KB Created: 2021-04-05 22:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03d8e309b9b58ad0f34a2b51e1965115 SHA-1: c114cc679aa863ba90c67011f5f5052777a65387 SHA-256: cbd85029fe4900fb12a53b0374e40e33cbff505530ddc37db7bf0c9c9ced08f7
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, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to software, specifically 'Ashampoo pdf free'. No scripts were extracted, but the presence of external URIs and the phishing classification strongly indicate a malicious intent to deceive the user.

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://jottigo.ru/award?keyword=ashampoo+pdf+free+1.+1.+0
    • http://simenomevaxi.iblogger.org/how_to_have_good_time_management_at_work.pdf
    • http://wifokilite.iblogger.org/best_ebook_reader_support.pdf
    • https://cdn-cms.f-static.net/uploads/4448992/normal_600ffa81b317d.pdf
    • http://pevokepavaxe.iblogger.org/buvafapufore.pdf
    • https://cdn-cms.f-static.net/uploads/4413563/normal_602f76a34e695.pdf
    • http://sputnews.com/dreamworks_wheres_waldo_charactersd3wux.pdf
    • http://govetet.22web.org/how_often_do_you_water_flosser.pdf
    • http://sibasijiv.22web.org/marapidabugupozeno.pdf
    • http://yourbigdick.space/medogewajivadevopaskimu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vutupaxuvidebif.rf.gd/witurojori.pdf
    • http://kovefevejafuk.epizy.com/6.7_powerstroke_transmission_fluid_change_capacity.pdf
    • http://pumejak.rf.gd/91255221567.pdf
    • http://kiduxoz.epizy.com/80315114340.pdf
    • http://gexalejal.epizy.com/zanakejexuzibitaneroli.pdf
    • http://mepoketefetur.rf.gd/73621107823.pdf
    • http://vobulag.rf.gd/barfi_movie_songs_zip_file.pdf
    • https://s3.amazonaws.com/zunaporam/57026114681.pdf
    • https://s3.amazonaws.com/zonebon/porekotofa.pdf
    • http://juxonarevat.rf.gd/deep_breathing_guided_meditation_script.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_off0000ecc5.bin
0147ecd6b54a8eb1ddf6692fecb8d4946d763e1d2fd714fbbb2811a21f2e83c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC5 5020 bytes
font_01_sfnt_off0000fdd2.bin
12c801c2da7efdbb57aa3f7b4f0c208ce6cf735dd5772a4673b10331604a3e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD2 11380 bytes
font_02_sfnt_off0001247a.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1247A 4324 bytes

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