Malicious PDF — malware analysis report

Static analysis result for SHA-256 47de145ecc46bfda…

MALICIOUS

PDF

80.6 KB Created: 2021-05-15 07:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc593d516fc285960e11fbbd02c76d6d SHA-1: 2a4b468ba2db1973a15d94942e332cbe28d8bc24 SHA-256: 47de145ecc46bfdac5e5e82215ea8381032f088a6c47cd8408bf1e3c75beba77
126 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple external websites, including suspicious domains like jumiwimov.ru and pivojowemetobiv.mywebcommunity.org. The document body, though heavily obfuscated, suggests a lure related to HTML tags and attributes, likely to trick users into clicking malicious links. The presence of numerous external URIs and the link farm heuristic strongly suggest an attempt to deliver further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=all+html+tags+and+attributes+with+examples
    • http://pivojowemetobiv.mywebcommunity.org/adjective_worksheets_middle_school.pdf
    • http://lnstgramhelpcopyright.com/57836902984zygdp.pdf
    • https://cdn-cms.f-static.net/uploads/4485693/normal_605119842fb92.pdf
    • https://cdn-cms.f-static.net/uploads/4386354/normal_603bda9077584.pdf
    • https://cdn.sqhk.co/zolewiko/jghihhl/creative_destruction_hack_apk_2020.pdf
    • http://fesebenawasoz.iblogger.org/ririjumunojegafuxepazeket.pdf
    • http://pefilimozol.iblogger.org/84186779440.pdf
    • https://cdn.sqhk.co/wezufunin/uHjbjbA/word_serene_free_word_puzzle_games_online.pdf
    • http://organicsss.space/gogewyt253.pdf
    • http://meleworofazob.22web.org/turkish_march_sheet_piano.pdf
    • http://parrrtner.xyz/gatewusuvenikupegetifonu8jagz.pdf
    • https://cdn.sqhk.co/retakabif/MIr9jad/saluzoj.pdf
    • http://spain50off.info/minecraft_game_unblocked05pyb.pdf
    • http://stassikorskyi.com/aircraft_cruise_performance_chartsg1dyz.pdf
    • http://mavisuvegepufi.iblogger.org/fudosapofavaga.pdf
    • http://walkover.me/who_is_the_strongest_female_goddessmgwdu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nejesezape.myartsonline.com/bilingual_education_an_introductory_reader.pdf
    • http://bugenuvumap.atwebpages.com/51867515988.pdf
    • http://dufatiji.rf.gd/citizen_eco_drive_setting_instructions.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_off0000feb7.bin
eb997706bcce148fb7ac3f3afec25218de16ea13ca5dd9bb9729b73061b352c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB7 5664 bytes
font_01_sfnt_off000111d5.bin
5e8175af921588c8e9d614a3e8fe44057d9bbc0a592bb2408ef273adef967ff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111D5 10372 bytes

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