Malicious PDF — malware analysis report

Static analysis result for SHA-256 68287eacded92322…

MALICIOUS

PDF

82.7 KB Created: 2021-07-02 04:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74a93f8694ca3623e25120c9343bc194 SHA-1: dac33355ea73c65bdb5892fae2a57a705f6284fb SHA-256: 68287eacded9232255177c5f2bb9d20b6ec1bf76e2b8a68d779c0930ffe84ccb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm and employs a social engineering lure to trick users into installing browser extensions or updates. While no scripts were directly extracted, the embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://alaskacounseling.org/clients/8/87/870ae3779d21e956d596131c1dd113ff/File/37161597728.pdf
    • http://cappellastudio.it/userfiles/files/dedoforejapiniralobafinub.pdf
    • http://ilovehikari.com/uploads/files/9667443533.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607758ee8c005---16870235791.pdf
    • http://sys-svinding.dk/userfiles/file/nipadivufele.pdf
    • http://skupka23.ru/upload/m/bamipenurulevozokevo.pdf
    • http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/folubibepu.pdf
    • http://avandcie-automation.fr/ckfinder/userfiles/files/66115243202.pdf
    • http://greenlivinggarden.com/htdocs/UserFiles/file/79722544753.pdf
    • http://dijladentalcenter-qa.com/userfiles/file/suwerojunejetuka.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878ac167c50---4815905021.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63416cf579---89997069396.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/0433697480b15bc531a981c07d11818e/goposinazixenalisujijupe.pdf
    • https://twr1115.net/files/fckeditor/file/lebewolasorizosodus.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f54769a03---1089129551.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=call+of+duty+black+ops+3+mod+apk
    • 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://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_off0000dd52.bin
9e65ddb95e262afd225cf2ae32225521956511969dc33781acf3bff6f8c0ee89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD52 18076 bytes
font_01_sfnt_off00010ccf.bin
d0a625a7c9e5494b507c9ef35988494dbf86efe6ba54abf33ac07c9d15b5e681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCF 11004 bytes
font_02_sfnt_off0001265b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1265B 16792 bytes

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