Malicious PDF — malware analysis report

Static analysis result for SHA-256 4584205e1bfc2fb4…

MALICIOUS

PDF

79.4 KB Created: 2021-01-17 19:50:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ff5697a8e30447a345b7b9618100005 SHA-1: e915378ab0e4a75fec48498b01d1356a71f4eec7 SHA-256: 4584205e1bfc2fb4b7df8482e44cf7bde48227b31e58699bf24259b7a0286c19
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 part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to reference Minecraft commands, likely as a lure to entice users to click on the malicious links.

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://trafftec.ru/123?utm_term=minecraft+command+to+get+glowstone+dust
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/tizivedaxa.pdf
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5fd9cd961d955.pdf
    • https://site-1172047.mozfiles.com/files/1172047/blast_it_2_space_shooter_games.pdf
    • https://cdn.sqhk.co/remowiwa/hanjhhD/temple_spirit_runner.pdf
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/daribud-gixulufamo.pdf
    • https://site-1217191.mozfiles.com/files/1217191/jexiturovafonul.pdf
    • https://site-1203255.mozfiles.com/files/1203255/xamugabeza.pdf
    • https://cdn.sqhk.co/fosojatesog/IigTjgd/98035555075.pdf
    • https://site-1178414.mozfiles.com/files/1178414/50652287389.pdf
    • https://cdn.sqhk.co/kerutadit/xkhbibm/13112391773.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://turegipamikum.epizy.com/finativokexof.pdf
    • https://s3.amazonaws.com/satulibaren/narimojerinumejuta.pdf
    • https://s3.amazonaws.com/tabobujimo/cv_template_doc_pakistan.pdf
    • http://guruwemuzotal.epizy.com/66902573803.pdf
    • http://xivobotaxonid.epizy.com/zepalokizizur.pdf
    • https://s3.amazonaws.com/lulelepese/48748679203.pdf
    • http://vovajixavago.epizy.com/caller_id_apk.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e302.bin
c2472172177b562e2c483b3e0083da8428b92abcbda2bf1d2b9d64f714fd4d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE302 5440 bytes
font_01_sfnt_off0000f589.bin
1e50c003c7e5e213ea7490da7094c44c396b4d4146bcac365affa293b8e56999		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF589 10876 bytes
font_02_sfnt_off00011a21.bin
f2c57bc8a32bf33955a2405be1a0217a1b488b69bb2a2492611b2925a73947db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A21 16384 bytes

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