Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2539a697767c91b…

MALICIOUS

PDF

74.7 KB Created: 2021-04-04 05:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fe4a3fe7b1c9bcc54227ad180582a8a SHA-1: 76dc04e14eaa9bc83ae8ad99475e464f186c19bb SHA-256: f2539a697767c91be2d8b965a6d971a16ed62c641fdfdeb3edf537999f240697
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 ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware download site. The document body is heavily obfuscated, but the presence of the external URI and the malware detection strongly suggest a malicious intent to lure users to a compromised resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/award?keyword=letter+worksheets+pdf
    • http://kindraretterath.com/jediverazamakukade3lhxd.pdf
    • http://keysecret.ru/kipomelulupolaxitejo0tks.pdf
    • http://bosnoslovnoejelaniekupit.xyz/vararusolajumk57ed.pdf
    • http://servisvds.ru/huskee_lt4200_steering_gearjwkwk.pdf
    • http://xivoxuvawet.iblogger.org/fonusuxikekufibuxogewup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kikunojulejuj/wafimiliwub.pdf
    • http://lelikerakovet.atwebpages.com/tevuwewor.pdf
    • https://s3.amazonaws.com/jaloto/free_dsear_risk_assessment_template.pdf
    • http://xobebol.onlinewebshop.net/ratio_decidendi_and_obiter_dictum.pdf
    • https://s3.amazonaws.com/wiwamoxamo/18102017756.pdf
    • https://uploads.strikinglycdn.com/files/6852caca-ad94-4dea-865c-7b66db9602f1/rovers_morning_glory_not_live.pdf
    • https://s3.amazonaws.com/pugomonapoxuxe/6969367254.pdf
    • http://nevafofuvabovid.atwebpages.com/birifuvumer.pdf
    • http://lewinozed.atwebpages.com/62822306967.pdf
    • https://uploads.strikinglycdn.com/files/0460c555-a792-4c93-a2a8-445e339637d8/rokofusejetagob.pdf
    • http://fakolelapokaki.epizy.com/anova_estatistica.pdf
    • http://gefetela.epizy.com/97323393292.pdf
    • https://s3.amazonaws.com/rujimidujek/bipebo.pdf
    • http://zagofij.onlinewebshop.net/14771334545.pdf
    • http://kixajek.epizy.com/arbeitsvertrag_vorlage.pdf
    • https://uploads.strikinglycdn.com/files/cb09be43-3c39-4be3-ab2e-813b6ced968d/fructosamine_to_hba1c_conversion_calculator.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8a0.bin
f037ff3513acf96ea63c848b5c631c00069ca699b65817c9442c547f81b5adc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A0 4984 bytes
font_01_sfnt_off0000f9aa.bin
6289f8140f7be052a6d53e3ba3fda428fe9cdf506aa7f3d1324fd320c126cee3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AA 10528 bytes

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