Malicious PDF — malware analysis report

Static analysis result for SHA-256 35039630a218c15d…

MALICIOUS

PDF

86.0 KB Created: 2021-09-04 02:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5f24815fe91cf8f1594b4276dc63f2a5 SHA-1: 254eaef76a539e6f0f31522dbece09fa58a9dbfc SHA-256: 35039630a218c15d4322aa1286f2e9af9565ff1e6a9c8d40bb118f8b2dde8224
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The presence of a link farm and compromised CMS uploads suggests the file is used to lure victims to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4543

Heuristics 5

  • 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
  • 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://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/ec06f28d929ec17c2f8c691cccaee4fc/8541365213.pdf In PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611de37461d3a---49936426859.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/b6dfccf655ab1567852dfcdd717f2aa5/30251830745.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/zavuvotebu.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/611628a3c9c2eecba9b352af4396df9f/3415095335.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/3c468e7be893cb62d1d9f16d317b0ec6/jagukinekawenasirum.pdfIn PDF document text
    • https://kar360.com/resimler/files/49955901362.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/6162b73fe765e6223f25c24f7cbbfecb/72700296564.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/novotuw.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/logixivir.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2cec045b13---nuzibirinexonizudo.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/31at4rbk71f860uerq4p65ast3/16335942668.pdfIn PDF document text
    • https://brtim.com/uploads/wysiwyg/files/libis.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/40646172137.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca5f79b546e---3382384239.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/73402403332.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/70327343610.pdfIn PDF document text
    • http://nuestrasenoranm.org/clients/8/88/88a18899c67a61641ca1f7d027daa919/File/13429334272.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/zixodibibep.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/bugusarixewekepifatob.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/14447200329.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/pumagekojutigatemakokeme.pdfIn PDF document text
    • http://justsayhi365.com/uploads/file/porudu.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/74234457092.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=gta+liberty+city+cheat+codes+for+pc+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF943 10908 bytes
SHA-256: 13b797e580cd47516ca176ba26eac6fead5483bec0444a41836e21011bed22d9
font_01_sfnt_off00011279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11279 19480 bytes
SHA-256: 6231870c88fd5a831bdd42bc3bb270a2b7eeffa89fbca74911230592b298494a
font_02_sfnt_off000144c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1