Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dce06c267b7b94a…

MALICIOUS

PDF

74.3 KB Created: 2021-02-26 14:48:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 38cab2994139e72db5fd0d46549987b6 SHA-1: 46bb2d1ed197a452f65793b1ecbc2c929db0aa49 SHA-256: 1dce06c267b7b94af6774005a81a40fa45e18c22d8ec2c3654aa0e578a429f99
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, with at least one pointing to a suspicious domain ('midufefew.ru') that is likely used to host a phishing page or distribute further malware. The document body, though heavily obfuscated, suggests a lure related to 'waste time' and authoring information indicating it was generated by wkhtmltopdf, a tool often abused for malicious PDF creation.

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://midufefew.ru/award?keyword=what+is+definition+of+waste+time PDF link annotation
    • https://cdn.sqhk.co/wikepijosipi/ghSkjd0/80615586849.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/sp_404_vs_sp_303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406208/normal_6031bacc03a8a.pdfIn PDF document text
    • http://nutigunejome.22web.org/lutitusogamizeseve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389820/normal_5fd9126f9e180.pdfIn PDF document text
    • https://cdn.sqhk.co/tobajizil/ieTjigg/15074157235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424029/normal_602a0b52a1eb3.pdfIn PDF document text
    • http://nekimul.22web.org/how_to_watch_star_wars_canon_in_order.pdfIn PDF document text
    • http://dajexori.mypressonline.com/what_is_the_history_of_the_sweet_potatoes.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/zefudusawumujuzubesidoji.pdfIn PDF document text
    • http://poxijirubulemax.22web.org/platform_bed_frame_king_diy.pdfIn PDF document text
    • https://cdn.sqhk.co/likunubiba/hhiiejb/monster_dash_5k.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/68608301092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479902/normal_5fe9021830073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_5fea426aa84c9.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/bagifojowemapa.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/jgWzYgh/koala_brain_vs_human_brain.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/which_country_in_southeast_asia_has_the_highest_per_capita_gdp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tukudapig.epizy.com/set_top_box_application_form.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/divergent_fanfiction_tris_is_dauntless_born.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/bvmc-pstx91_mr_coffee.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_off0000e794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE794 5124 bytes
SHA-256: 777d6b43e3b19f2f0b4cd506d2710963f2367ca661d2b0e1c52f4aa7add72570
font_01_sfnt_off0000f8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F9 10232 bytes
SHA-256: 95cbfc05b1e0d47157e7e4f12b3fb7b09ce0fce4faaafa29241d7af87e393c00

Open this report in the interactive analyzer, or submit your own file for analysis.