Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c2f2c801feac98…

MALICIOUS

PDF

85.0 KB Created: 2021-07-02 05:34:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d21dfc9a08f580938011ee572354756 SHA-1: 9b7c4f31627321b6a1bbfd916a62ae1623c45691 SHA-256: f5c2f2c801feac98f5bc1f65772d86635ea84f46914ed1f299196c7d100226a7
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 high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous compromised websites and potentially hosting malicious content or phishing lures. The presence of multiple external URIs and link farm indicators suggests an attempt to redirect users to malicious destinations, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/hrqgal8src1qch92tstthb51p4/33355090587.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f664470790---takisirodapezu.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac0f2ecb80---kapovadikililorelel.pdf
    • http://beautybybelief.com/admin/images/file/vaxesisopezizofuzojajo.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/jurf94j6v9dsvl78jl8iqpot3p/88436649983.pdf
    • http://candientushinko.com/images/file/silubozidisetumiberurowo.pdf
    • http://accessiblevehicleservices.com/userfiles/file/getujelafugivofunovem.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160832b74e7327---1620929059.pdf
    • http://alanurturizm.com/rsm/files/dowavoxidolepazij.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd3afb9988---12239799279.pdf
    • http://driver-jazda.pl/upload/file/zinuginej.pdf
    • http://miwon.vn/app/webroot/uploads/files/67156141850.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/34if2c8q8cag169vda8oe47kka/mavakigig.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3e0ef71cb9c08bdc7675d1e52e6fceda/rexilofewitajutesufozap.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2b0b7e69b---43439122128.pdf
    • http://local-minicab.com/survey/userfiles/files/wukidiviwitam.pdf
    • http://netflor.pl/upload/File/waxuzosizovobenazos.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac255bd2574---ligemiv.pdf
    • http://krikrik.ru/uploads/ckfinder/files/xazusukowomerawov.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/6fe00835ec8f326bdeb150f81d4b3058/zezojatokifojajow.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/2cate3fit5pjnh49ms4p7v42e3/nebokofunojolowuseladon.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa10d7bc303---kusudeno.pdf
    • http://duda-tech.pl/dudatech/upload/file/fafomopifitujufira.pdf
    • https://bandotrading.it/uploads/file/damunomojawazuduzeripi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=story+sum+for+class+2
    • 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_off0000ea3e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3E 16792 bytes
font_01_sfnt_off00010250.bin
118f82816c2eb6c1d328ae6271085d449fd1e709e1fac53779db8c3146126242
pdf-font-stream PDF embedded font (sfnt) at offset 0x10250 17304 bytes
font_02_sfnt_off00012edb.bin
5facaed8c79faa726205dfbe9f809a05282b522325a7266489b99009f5aeb2c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDB 10576 bytes