Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfe02fedbcac5cd…

MALICIOUS

PDF

85.6 KB Created: 2021-07-06 22:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8b41efe18aae54564e3d383864c1fd4c SHA-1: d3225c8488cc1f74ab1df3b1d7af1110ae106256 SHA-256: abfe02fedbcac5cd5a48ecd40a9a7ee6925d77954e01465c745f5d2cd566fec8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, suggesting it's part of a phishing campaign to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the presence of numerous external links and the 'link farm' heuristic point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • 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://ketchas.ru/uplcv?utm_term=long+term+disability+denial+lawyers
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b14643c561b---felekalitubosumavixofi.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609837123e82c---19475875345.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708210ca2dd---17126734586.pdf
    • http://likebarcode.com/image/files/20210705_104430.pdf
    • https://astek-telem.fr/userfiles/file/50959538940.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7c5a957fa---toredef.pdf
    • https://tedvandergulik.nl/userimages/file/danub.pdf
    • http://519pf.com/userfiles/files/54333386320.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/r09uaiffsod94nobq97pv20t4t/xugalifiguxag.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/m4qvvjufrvsap34m86m8g4i1ab/30252733949.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc68bbc958---7270303700.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0291e798a---40735157033.pdf
    • http://littlepearlspublishing.in/data/eimages/file/tokobu.pdf
    • http://novussiteyonetimi.com/uploads/file/xisegojazulapipemef.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/77ec568b975876acbf1247a382eedd8c/24444697381.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/bffdbe9f97da3dd95fe06511af4516b3/vobelufob.pdf
    • http://studiolegalezullo.eu/userfiles/files/97822306409.pdf
    • https://tailormade-sales-marketing.com/userfiles/file/zirutexisasatab.pdf
    • https://powermailer.in/userfiles/file/91643484116.pdf
    • http://dyglas.com/userData/board/file/mexenigitus.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742497cef29---86380378418.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a756c623b---porogimelaz.pdf
    • http://megat.pl/uploaded/fck_files/file/20377755763.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/72179951982.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c0af906e23f---rifopanutifu.pdf
    • 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_off0000eab0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB0 16792 bytes
font_01_sfnt_off000102c7.bin
2ef19ae3799e7d8e47d24ca1e123f36a204f1171a39e3f268f8ce16ce268453f
pdf-font-stream PDF embedded font (sfnt) at offset 0x102C7 10888 bytes
font_02_sfnt_off00011bcf.bin
c79b87de3c4c9a44bf4a23117f57aae86aaebaf4decdbe9e4ce7da46548eca1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCF 16664 bytes