Malicious PDF — malware analysis report

Static analysis result for SHA-256 325c35616ea9a4d3…

MALICIOUS

PDF

151.5 KB Created: 2021-02-28 13:35:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 0e787b5fb15a05524834d3cfe80b6f6d SHA-1: dbfc779a1f30c71ff01c17665289663f298e30b6 SHA-256: 325c35616ea9a4d3e9fae751107e180de44a33a8bf890463e803b9dd7b94e171
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL leading to a suspicious domain, identified by both heuristics and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to educational content, likely to trick users into visiting the malicious link. The presence of an external URI and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

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://xezojetit.ru/strik?utm_term=vocabulary+words+for+9th+graders PDF link annotation
    • http://aicberg.net/felanizisawedaguduxexusouz0hz.pdfIn PDF document text
    • http://donuliwobem.iblogger.org/79877053369.pdfIn PDF document text
    • http://tegogufe.22web.org/forest_lakes_metro_district_map.pdfIn PDF document text
    • http://alcozerox.com/sorenupefutopiseri.pdfIn PDF document text
    • http://ru-dev.xyz/logitech_g900_chaos_spectrum_reviewipsah.pdfIn PDF document text
    • http://blubadgehelp.net/arbys_nutrition_facts_sodiumwmd79.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/cas_lp_1000_labels9fr3z.pdfIn PDF document text
    • http://ratonawe.iblogger.org/13588277590.pdfIn PDF document text
    • https://xibixijuli.weebly.com/uploads/1/3/5/3/135399677/1c5bdae7093.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/taturi/fr_elise_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/dogimabuje.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/27157719584.pdfIn PDF document text
    • http://tidegofavinugaw.epizy.com/why_my_dryer_not_spinning.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/atenolol_dosage_forms.pdfIn PDF document text
    • http://ritikaju.epizy.com/nowirefe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002197b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2197B 5736 bytes
SHA-256: 9746c372344c50d190b7a0d3d27b9aed76e7bbfb44b9422a591e5e5fb3a76a1d
font_01_sfnt_off00022d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22D16 10372 bytes
SHA-256: 7c99ed4803834245bab097382e29f8b56eb8b38546fba1e0602cb07aed807628