Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b6a5a7c22a07e87…

MALICIOUS

PDF

78.4 KB Created: 2021-03-26 10:36:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc9c1ad5cec3bce44e35fca5d6284221 SHA-1: 7b9b01ad06a66bbade12de6546620395b9a770a0 SHA-256: 3b6a5a7c22a07e8751246e0fcd7c565f8e68ea25b48e313550f27f518c0dd79c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=toyota+hilux+revolution+2020+price+in+nigeria
    • http://eurozone.pro/how_much_to_rebuild_a_ford_302ubves.pdf
    • http://realwockyc.info/love_story_song_piano_notespghk9.pdf
    • http://cosmicgig.com/kusogavuwiduzidotumobateqt4wp.pdf
    • https://cdn.sqhk.co/jaziwuke/CuhfjeM/bricks_breaker_infinity_mod_apk_revdl.pdf
    • http://sadovik.me/macbeth_act_2_scene_2_analysis_essayejhpr.pdf
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5fddc7c8e4535.pdf
    • http://cosmosqrab.online/how_to_get_sim_card_out_of_alcatel_flip_phoneqokhr.pdf
    • http://ultra0.space/survival_horror_zombie_shooter_gamep1lhx.pdf
    • https://cdn.sqhk.co/gobajejuz/chbhfib/fijidupe.pdf
    • http://twitter-center.com/87687175591qbwyd.pdf
    • http://souve.me/ver_pelicula_en_nombre_de_la_rosa_online_gratiskm42z.pdf
    • https://jololese.weebly.com/uploads/1/3/4/5/134599323/vibixepizireposiriva.pdf
    • https://belinadojo.weebly.com/uploads/1/3/1/6/131607131/98284f47b.pdf
    • https://cdn.sqhk.co/vekuperik/9OiCxhd/32507761407.pdf
    • https://static.s123-cdn-static.com/uploads/4473432/normal_5fcc5389a9cbb.pdf
    • http://1freedom.space/wewaxuwelixewanowezomuz6pln7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3fa.bin
2791ef72d09224831e0c4ca697948f85b1a72f02791d6dae9c8acb9bfc06ff45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FA 5352 bytes
font_01_sfnt_off0000f630.bin
4637140acce7be22c60dcfa3ec112b44f066466616b14d3b83eafdbc047e70a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF630 11120 bytes
font_02_sfnt_off00011c49.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C49 4324 bytes

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