Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d446e3db5bf70ec…

MALICIOUS

PDF

80.2 KB Created: 2021-03-24 17:20:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11388b620556476788cea78bed5a4702 SHA-1: cd1f6cb60665e348dfb815896f64d39e5cce2bea SHA-256: 0d446e3db5bf70eceff6c29a41cc0a25fa1bbeb9eeb2a24b3c0802e2ef7c0548
126 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs further supports this attack pattern.

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://pelibifir.ru/wix?keyword=the+lightning+tree+pdf
    • http://tryici.xyz/dark_souls_3_4_lordsnnrrd.pdf
    • https://kafowuvipuv.weebly.com/uploads/1/3/4/3/134337110/vasumawutujes.pdf
    • http://dojemop.mywebcommunity.org/gabemodexikofaluviwatuz.pdf
    • http://konolux.medianewsonline.com/calendar_2020_january_to_december.pdf
    • http://sport-stavki.fun/boris_and_the_dark_survival_song_1_hourk7owc.pdf
    • https://cdn-cms.f-static.net/uploads/4422161/normal_6056bcc36f52e.pdf
    • http://connexion-amelii.xyz/how_did_the_map_of_europe_change_after_wwiitq23w.pdf
    • http://fitokapss.xyz/34028908717yjept.pdf
    • http://tebogekememesij.mygamesonline.org/political_map_of_europe_blank.pdf
    • http://about-fb-support.com/zubetanarunogotinoturiv33e3y.pdf
    • https://kuxifegofemiza.weebly.com/uploads/1/3/4/8/134865321/1966443.pdf
    • http://kaxiwemusemoj.mypressonline.com/physics_chapter_3_study_guide_answers.pdf
    • https://static.s123-cdn-static.com/uploads/4393908/normal_5fee2f0401374.pdf
    • https://mujolimu.weebly.com/uploads/1/3/4/8/134868529/6970560.pdf
    • http://sizegoduxuxa.mygamesonline.org/adding_and_subtracting_algebraic_expressions.pdf
    • http://ruluzuzadol.mypressonline.com/gagof.pdf
    • http://tijudozi.scienceontheweb.net/77718000463.pdf
    • http://iminn.ru/gusenukopepapatodujexiwaoqzcs.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://desejole.myartsonline.com/sutuzutawojiw.pdf
    • http://gevejonitu.onlinewebshop.net/kidajodukasozap.pdf
    • http://gumomexad.onlinewebshop.net/nail_places_that_are_open_today_near_me.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_off0000feb6.bin
007ce7b342bfc584e0f4513fff8f5db53aa457dc68309d6d73f07440783c485c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB6 4864 bytes
font_01_sfnt_off00010f42.bin
a979260c0bd76724719fcd91ea3fe514bcf875a5109be931ddd76b9efb620dfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F42 10560 bytes

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