Malicious PDF — malware analysis report

Static analysis result for SHA-256 11411fabcd2bbdbd…

MALICIOUS

PDF

85.6 KB Created: 2021-03-10 11:34:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d6f9ea6c293d67563e4f0e968a0f2b22 SHA-1: 47527f76b196247bec7a6d3c8ef42e7c9f6bbc21 SHA-256: 11411fabcd2bbdbd0f3f909d12aac9488fe11917cbaf890d92ea736d6c739b39
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm strategy. While no scripts were explicitly extracted, the nature of PDF exploits often involves JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/aws?utm_term=emerson+quiet+kool+portable+air+conditioner+reviews PDF link annotation
    • https://cdn.sqhk.co/xepiriza/keZKDgj/lawmakers_and_legislators_notebook_guide.pdfIn PDF document text
    • http://lesantyqas.online/sabinazusivn5ivs.pdfIn PDF document text
    • http://svoytrylend.xyz/42844292334svwku.pdfIn PDF document text
    • https://cdn.sqhk.co/gozawelesutu/if7hdge/roboplus_dynamixel_wizard.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/64igWDb/hd_car_wallpapers_1080p_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/aWsshjI/80907078996.pdfIn PDF document text
    • http://alcexpress1.xyz/how_to_eat_fried_worms_movie_free_onlinelg4ir.pdfIn PDF document text
    • https://cdn.sqhk.co/ropikenetu/haVjjZv/laguleziv.pdfIn PDF document text
    • http://tipopajokoti.iblogger.org/16375240188.pdfIn PDF document text
    • http://gorerusuwoto.iblogger.org/xikuxepokuzosajuki.pdfIn PDF document text
    • https://cdn.sqhk.co/juzivadareka/hgsfPhe/don_t_rush_lyrics_remix.pdfIn PDF document text
    • http://tuwavetatifida.iblogger.org/79766924650.pdfIn PDF document text
    • http://lavkavkusa.store/vilivumedudedakojinuzoyxssi.pdfIn PDF document text
    • https://cdn.sqhk.co/rodisukipi/jjgZhdZ/pufenesigurotumexebebax.pdfIn PDF document text
    • https://cdn.sqhk.co/vemegunir/dXhcQ1d/xuzawizodedos.pdfIn PDF document text
    • http://gufutaca3.xyz/download_game_rope_rescue_mod_apkjffds.pdfIn PDF document text
    • http://my-favshoph.online/601285112850i3x4.pdfIn PDF document text
    • http://megatorg.ru/what_are_some_examples_of_leadership_goalswpq13.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/jd2Njc7/knives_out_streaming_hbo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bumelujezi.epizy.com/black_cherry_nutrition_information.pdfIn PDF document text
    • http://xatudoxi.epizy.com/philips_avent_monitor_manual.pdfIn PDF document text
    • http://memugeb.rf.gd/zexorifakixijekafixagupov.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_off0001100b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100B 5656 bytes
SHA-256: 12a706e770961976dab0a641b5254602fc4a7c12887014855c036fe513fa8da9
font_01_sfnt_off0001233c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233C 10936 bytes
SHA-256: d76d39f4b93fcebfb7d0e8e55bb5cd411b3b8b52c868f1d319379ee349155508

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