Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2710a165ab8400…

MALICIOUS

PDF

89.7 KB Created: 2021-07-20 00:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 081cd6f00c6f0c1e7fd8eef0583e3674 SHA-1: cc7a179a185e786ae8baa3fdda68fa191c07bbfa SHA-256: ed2710a165ab840026aedaa3270c29ad94cf6284dd0b554a4bb220588d7b024c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a non-clustered link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://edinburghpools.com/contents//files/7648445790.pdf
    • http://insidethedigitaltrend.biz/userfiles/file/10971109954.pdf
    • http://ty-universe.com/image/files/20210609_162027.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17a8ec315a---nekeroxedezajakofa.pdf
    • https://lesfeesdelhetre.fr/upload/files/79933977528.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854a3eb3dc3---nesikigiviromuwuli.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2281b837a---wuvubu.pdf
    • http://pnmanagementsolutions.in/uploads/84707473336.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/73cd6335c44a069bd631c2db3531fd06/meromokinireze.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/hdg2ultc19vq0qr7f9js85nr7l/pokuropaso.pdf
    • https://cicadit.ro/UserFiles/file/70658669670.pdf
    • http://osc-pribor.ru/products_pictures/file/12743653547.pdf
    • http://pamat.ro/UserFiles/file/dewukiwegugegot.pdf
    • https://fotofidelity.cz/userfiles/file/62255542338.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724d56ede9c---17208765963.pdf
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1541fd88---26309195616.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/c038aba96700b3253cc33ddf9d2cb0fc/2205142695.pdf
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/40338285193.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/92ff05ac9202eed9523eab43c3962f63/dukigilegupubigajajaga.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6801ef89a---26534706185.pdf
    • http://jentretiens.ch/uploadimage/12115060075.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/52rcqsj8fltifd0p8vud77omrl/32748007971.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c12229109fe---zazabuxiwowozot.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/08477ce88033ff6386c434cc074b8d2b/kazirobezanum.pdf
    • http://yangpupark.com/uploadfile/files/gugexobofutuzeza.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=pea+and+asparagus+risotto
    • 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_off0000fb09.bin
cdc4d51b36e78fdbda3c846089a12c7356f27b432e659b2771092065b45ac2b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB09 10620 bytes
font_01_sfnt_off00011336.bin
03e2daf74a7f5dc36e52c75a53d145c1d92742356547601a7c34e414ca1eaa01
pdf-font-stream PDF embedded font (sfnt) at offset 0x11336 17172 bytes
font_02_sfnt_off00013fdc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDC 16792 bytes