Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa37596da1bfdd1…

MALICIOUS

PDF

91.0 KB Created: 2021-06-30 01:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62930c0458f8149b1617cc69321409ee SHA-1: 44cc46f6283a23ba79caed9470a871def83e92ad SHA-256: 2fa37596da1bfdd116d1f3740a697f18b2da97ace8bb2a5668907bc81ea5604c
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress sites, likely intended to lure users into downloading further malicious content or visiting phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the structure suggests exploitation of PDF vulnerabilities or social engineering to redirect users.

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://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6c4147407---zubefuz.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/4569cc39e2ea2c590113d062711b353f/nikokaperosofobo.pdf
    • http://messtores.ca/fck_user_files/file/35817874303.pdf
    • https://aduanaldelvalle.com/userfiles/file/62748712044.pdf
    • http://lueckerreunion2020.com/clients/e/eb/eba09433058400eda594a485f9004317/File/19749145755.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/2d85c846a9b280cfc174a6eb7434cafc/fufemix.pdf
    • http://agnieszkapawlik.com/userfiles/file/2459475720.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/6abt1q6dt86mpfjjvand21s1mk/mazawiriziwanapetomi.pdf
    • http://naoshima-habitant.com/naniwemenebol.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/5066a4ad8eeaa5ca99d9cb798da0d779/51074334860.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/15f6540707f5d42bbcb075aeee231d19/49024672687.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/7d9d69a432e7c9ed3e7bcba5717f1b2f/gebukiwo.pdf
    • https://sca-kc.net/scauserfiles/files/zovuzewasevujewixidin.pdf
    • http://dermaktif.com/imgup/file/lasunuboxagotifutuba.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/7be6fa2f713ddd23e05b2bda357eedf5/27248727529.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609648cc5da67---ligugivifewukoxosinal.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608109bed1018---vegegukejidumivi.pdf
    • http://barcelonasixtytwo.com/userfiles/file/zilapemo.pdf
    • https://yar-net.ru/userfiles/file/tetisizasiwapeporon.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab52824e4a---vokubigabugaxuziziniwa.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b22fbe2e302---bugifidosesosimu.pdf
    • http://wannawwannie.pl/userfiles/file/wolagemoxipe.pdf
    • http://phantasos.org/userfiles/file/84688163631.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81fb956886---31025585222.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=dna+sequence+transcription
    • 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_off0001011f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1011F 16792 bytes
font_01_sfnt_off00011936.bin
d8bda40f2969ee979f8ef9f0c60525e416f3bb151a53102e7853b6174b5e4a42
pdf-font-stream PDF embedded font (sfnt) at offset 0x11936 10568 bytes
font_02_sfnt_off00013171.bin
cdb4ced55b856a45d5268e63bd233d1ced5825f9164d4990b9fefbe56a90d821
pdf-font-stream PDF embedded font (sfnt) at offset 0x13171 17580 bytes