Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2e976e504ef29a…

MALICIOUS

PDF

94.5 KB Created: 2021-06-26 01:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 95338de8f05a8af77305a8379853264a SHA-1: 2006dafcc5b5314c7c0110ada18b9daceebc62f2 SHA-256: ab2e976e504ef29ac18cafc72615a4da6d0019ab3219b58f9bebfcf90a9ea9d7
204 Risk Score

Malware Insights

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

This PDF document exhibits multiple indicators of malicious intent, including a high ML classifier score and ClamAV detection as a phishing trojan. It contains a link farm pointing to compromised WordPress sites and includes instructions to disable security software, which is a strong indicator of malicious activity. The presence of embedded URLs and the overall structure suggest it is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/f8cf8bfd2934889d2ddfa23280567625/72656845333.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/9egbkeb6pgq8f8marfcu6a1tah/28242175602.pdf
    • https://ebooksweb.net/files/file/56026244812.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071014c90743---tizetiwomoxev.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d65709a9bb2---lemaxojerin.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608789c8a181d---kesokuwazasavugegila.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094dc8a8b8ac---54308101408.pdf
    • http://gazosilikatnn.ru/uploads/files/11270385730.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/481682243c1cac30dbb816e1776a47f1/14853574172.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/a1229747db2a7f10a092bc2de838edd9/30911064941.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/52f0d225fcb93e1a30132457275b55b1/66394191152.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d76cad22df---84824707629.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/abee89b240c138142e6600221dc55797/26671212332.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bfe6742b1---kojixuro.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/fc91d7a012575c8bd5786af50baa28de/xivenexasikadugulureges.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc5f3740da---78203362669.pdf
    • http://cn-junsheng.com/upload/file///2021621687726.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/uat0uqi22gj2g7k1daslecbb18/kotoveleriwa.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6a8dd4ec0---91176716071.pdf
    • http://htwy.com/upload/file/worim.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d01e164f---zabonevutakenibigevumovi.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3b41cc5c4---niwute.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/59100100444.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077899e5fd30---70245380124.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c626275c35d21b904abb415fc5ba16c6/17166101433.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/28e031caccece3515c9d3788ddd6b4ba/safixawilemefutuxod.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=rusted+warfare+free+download+full+version
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3da.bin
d27d457e8ee66a334f9ed8a06302a5381379ccb77a6bb6c3f634b69d0a2a7a51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DA 10644 bytes
font_01_sfnt_off00010c69.bin
0e3d63f173342003c62a86c726d4d5a85e7f52d44cf06618766a4fa08a0866bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C69 16088 bytes
font_02_sfnt_off00012198.bin
ffb7a4c54149c706a1176b6e01a3c550b0d18778685ca749acd35db19ac575f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12198 18288 bytes
font_03_sfnt_off00015200.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15200 16792 bytes

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