Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0d43f5e39cce8f…

MALICIOUS

PDF

75.8 KB Created: 2021-02-27 15:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f7030c62b45e354e93a95901e17ee340 SHA-1: d8b71842fc261a5450d86a114d45013793654518 SHA-256: 8d0d43f5e39cce8feb403742b7b19c7e8e51ee9e7d1aef93ff374d60e6d24a49
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware delivery attempt. The document body, though heavily obfuscated, contains text related to 'legally privileged and confidential' information, suggesting a lure to a malicious URL. The embedded URL `https://soxebez.ru/strik?utm_term=when+to+use+legally+privileged+and+confidential` and the linked PDF `http://tokexal.medianewsonline.com/90537757103.pdf` are strong indicators of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=when+to+use+legally+privileged+and+confidential PDF link annotation
    • http://tokexal.medianewsonline.com/90537757103.pdfIn PDF document text
    • https://cdn.sqhk.co/bofozuto/fhj87ib/mobevuxepusafegadud.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/65479314894d02r9.pdfIn PDF document text
    • http://titanovyi-filtr.ru/refresh_worksheet_excel_shortcutx3yms.pdfIn PDF document text
    • http://lestyprin.online/aristotle_poetics_catharsisij8gc.pdfIn PDF document text
    • http://getbuiss.online/what_is_a_seminar_class_in_collegerv8fm.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/puroferogubix.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/giwokuvuka.pdfIn PDF document text
    • https://cdn.sqhk.co/koxuzofu/cPnsicB/space_particles_3d_live_wallpaper_apk.pdfIn PDF document text
    • http://taygerr.com/pixujharjm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vuzexoba.rf.gd/lavonivakojebezez.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/poulan_16_chainsaw_chain_size.pdfIn PDF document text
    • http://kitakel.epizy.com/cricket_sport_information_in_marathi_language.pdfIn PDF document text
    • http://gesonumakokobal.rf.gd/boom_boom_momoland_song.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE59 5472 bytes
SHA-256: 258a4657ff0d51417569883bc5cd852af144ab3de51fd91ce9e46bf4df801232
font_01_sfnt_off0000f104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF104 10288 bytes
SHA-256: 5cb4e737714b302e80e766f8a7d6f2d61c5a403d013883f5f1921b0373b76a57
font_02_sfnt_off00011456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11456 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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