Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad5498db719a4be…

MALICIOUS

PDF

92.7 KB Created: 2021-06-26 00:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc7d96592768a70076da2e431f831cd5 SHA-1: cdc1c13f67361b926a1048a26119e5c1fa4f17ef SHA-256: 6ad5498db719a4bef85a90232be22b50f952fd87e282f9805b25a7399dc7908e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or redirect users to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the structure and URL targets suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/a0hn4dkjg0eslerjrmoi72umvk/pavafodurenuzoxogefena.pdf
    • http://petukmahaaaraj.com/userfiles/file/55575346086.pdf
    • http://innospectrum.eu/hirlevel/file/gosuzatibinamosulefajasof.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a18fc6b01---tinefazilut.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/19773028f016a831efabcae122c63a6f/xalosi.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/0k2n3h6ivvdvb5b8lg2groi696/kuduxelozilegurol.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f32439db8---83013304612.pdf
    • https://stratasphere.online/userfiles/file/17103575177.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70bf54c20e---57577179521.pdf
    • https://educationindiajournal.org/ckfinder/userfiles/files/vobafasugawew.pdf
    • http://lapenya.cat/imgjovesnaves/file/25594492555.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/7dl0dh4qtqc8p9p7ptf269t747/56248203316.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/mcc8ll3fhgp93putv50d02kpd3/65858974204.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/575116c1dbda4600d5c6006b5fed4bd9/xojidukirezaruboviwij.pdf
    • http://galeriejacqueselbaz.com/userfiles/file/zedokiw.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/f78f01a5e80b509f23abb4279b99ae20/rexin.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd66bac1f5---50620210270.pdf
    • https://capecoralliving.com/media/file/10665121138.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/d419dc9ef0880a027eedcfdfda46e371/76564912183.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/b615650eeea6ca9bd568a1fdfd87ffe5/jemexojunenepolumowi.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707f027074a---36240170697.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=when+is+pride+a+sin
    • 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_off00010979.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10979 16792 bytes
font_01_sfnt_off0001218b.bin
b40b4c0b37db2daa9c789aaf359ab4797717912f049a350d663b1d989e3b59b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1218B 17428 bytes
font_02_sfnt_off00014efc.bin
d9ae2ebf02f9f513b97198c4a6ab306a6b5cb26920f3822cdb2be1f7ec259b8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x14EFC 10220 bytes