Malicious PDF — malware analysis report

Static analysis result for SHA-256 16603856116dccdc…

MALICIOUS

PDF

74.6 KB Created: 2021-03-09 13:19:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c52eaeb35eb32d3e77cd92c759900756 SHA-1: 159953d6f734420674e003ff9c51e332ceabf675 SHA-256: 16603856116dccdc89c219a283387437bba9aa9b7929a7f43fadc63d50f74a96
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to search terms like 'Sims 4 labor cheat', suggesting a lure to trick users into visiting external websites. The numerous embedded URLs, many hosted on disposable domains, further support this phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=sims+4+labor+cheat+2019+xbox+one PDF link annotation
    • http://jixenuxevati.22web.org/52570407021.pdfIn PDF document text
    • http://form-copyrightservices.com/aha_bls_provider_manual_2015zlzdn.pdfIn PDF document text
    • http://fenellalucynelle.info/is_it_bad_to_live_near_a_nuclear_power_plantrybbh.pdfIn PDF document text
    • http://funseeds.site/15607173593mhcpz.pdfIn PDF document text
    • http://rijunoje.mygamesonline.org/62846633412.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/lateral_thinking_puzzles_for_kids.pdfIn PDF document text
    • https://cdn.sqhk.co/pevizopubok/ejb3xUH/24556123464.pdfIn PDF document text
    • http://zajiledafalam.getenjoyment.net/attack_on_titan_recap_movie_2020_release_date.pdfIn PDF document text
    • http://uablog.website/criminal_law_examples_ukucnah.pdfIn PDF document text
    • http://helpcenter.business/560049122006klh.pdfIn PDF document text
    • http://fortuneo.best/game_dev_story_windowszmshh.pdfIn PDF document text
    • https://cdn.sqhk.co/lovuzegonu/gdaifqY/bugaxuniwimizarufezim.pdfIn PDF document text
    • http://kufagexuwinu.22web.org/wahl_cordless_detailer_li_trimmer_t-wide_review.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/eighifH/glowroad_app_download_apkpure.pdfIn PDF document text
    • http://letgtma.bid/jujoganimobuletupebukipeujbmq.pdfIn PDF document text
    • http://verenica.net/rainbow_cupcakes_with_white_cake_mixchs75.pdfIn PDF document text
    • http://soul-felt.com/how_many_spell_slots_does_a_level_4_paladin_have45qnt.pdfIn PDF document text
    • https://cdn.sqhk.co/tipesewete/9ijdgPq/daily_express_sunday_crossword_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/gggr2ic/freezero_mod_apk_happymod.pdfIn PDF document text
    • https://cdn.sqhk.co/warugariluxe/Hjeigjg/piano_tap_tiles_magic_3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tamegebodow.epizy.com/jofajibidaxazufibavomise.pdfIn PDF document text
    • http://wokarodefi.onlinewebshop.net/69553024879.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_off0000e457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE457 5920 bytes
SHA-256: 84a9755cf16cca63efe617c3bfc6cb67fa9ddda4ab2a8ec304626498aa7b7503
font_01_sfnt_off0000f85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85B 10752 bytes
SHA-256: 18e68aac47a0688b97f797339934ce3f2d58d6483b91801e7a519229f09ed3bd

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