Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3caa3c85b31b22…

MALICIOUS

PDF

76.9 KB Created: 2021-07-23 16:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6643542bdd8106cdad6c58542c1ce3f5 SHA-1: 26808e235301970f8a48758a4e644ec41426f77a SHA-256: 2b3caa3c85b31b229b1820ffa9407ed4ac97c826c6fcf051de8d1ca2e23e7d3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://jnnycc.org/userfiles/file/21890625476.pdf In PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/7dbd12f203f871d28bc044a701400eb6/5218073861.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/letovizurug.pdfIn PDF document text
    • http://chinahongji.com/d/files/nenogozopizifugenipom.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/l1ib83uh1cs2kjp9uds02spi37/nepasoligotodomo.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/49065680422.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/0cf620b29ef15ece1078e5703d645cba/26017374639.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/75344349691.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/51013272829.pdfIn PDF document text
    • http://www.serenissimaservizi.com//files/26535791353.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/45026a59f1b441df797c3b8878933626/balafoxoxugapawabisupolo.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820d07ad2d2---dubanodosiweju.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a0730733780---sakubamelofenutesevoluga.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/a0be794aaad2dbd8faceba7fe524a23b/7983934305.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/mbo883jo9s1hqnash0k06ml80r/fokelunuvuganub.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/37f374835c34dd7771a0c74bd99bf088/guteweweserodipon.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/turibavogizuko.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ba705b246---12549668723.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/583700580.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/sorejemafavuwij.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/witunusotajov.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94fe5acb3f---vexaraxesaxopatufujama.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/nupufaratusipodibulid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=what+times+what+equals+117PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000caa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B6 16800 bytes
SHA-256: 65863f2479bfc29b5321886ccef4a7263e75005a8cad5701ebbd9b92a36e335b
font_02_sfnt_off00010e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E64 10476 bytes
SHA-256: 48473a911f9c880b1da8c62a2e4a9807b00632acfc08affaf99e4d2d78cca5a0

Open this report in the interactive analyzer, or submit your own file for analysis.