Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b75299c575b622…

MALICIOUS

PDF

86.9 KB Created: 2021-06-29 23:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd3438611d4d5b06b29c046f518141f7 SHA-1: 528da94eb815e4bae3031c392d1ca7ba7c92aba3 SHA-256: 97b75299c575b622a1d4de4fde1990616f0e6bffc43e91290d5ea545612201d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to potentially compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the PDF structure itself point towards an attempt to exploit users through deceptive means, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b31c024db65---65020195898.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/wizupiwajukip.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/6f073d3537e91be4fdaf7359db662703/66576863444.pdf
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/125fa776104ea0f995ccf0cb7b50720a/pefatatif.pdf
    • https://toskov-yordanov.com/userfiles/file/gufixumukuwaxunefotosuto.pdf
    • http://adamlegal.com/userfiles/file/27654997492.pdf
    • https://catwalkdogcome.com/editor_upload_image/file/74760875811.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/skg88bbp61mdlmthbgk9ocu5i7/13010110583.pdf
    • https://assignmentmart.com/ckfinder/userfiles/files/64063976090.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16088ed5e4ef2d---96819437285.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/i414cbt2cl0oam96ctpvbrj7jn/9667324133.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b918a9cea9f---degefowoligadeferulemu.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/388526b46d1c2dc411571e88a5441be1/xovilatepovurizelogava.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/f93pvlg61to5j8o74na8ceiieg/losufiguluwavotutuk.pdf
    • http://jevades.com/aircraft/fckimages/file/nibabuwamiz.pdf
    • https://socohoteldanang.com/uploads/image/files/70605181169.pdf
    • http://vtaky.sk/media/file/68106519345.pdf
    • https://ludifrance.fr/userfiles/file/malujerakizewozuminulow.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092df9e47942---japogukagifetad.pdf
    • http://sujitonweb.com/userfiles/files/tinewaj.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/gcjq48dkmmaar9f89e389asjvf/pinonaxexubazukolemum.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607423126e53e---44183035035.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+warm+up+garlic+bread
    • 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_off0000f17f.bin
a0b1f9e9f1cd9abc02f349bc3e8722bf3a5db9bdae34be17534ce69de0b52743
pdf-font-stream PDF embedded font (sfnt) at offset 0xF17F 10904 bytes
font_01_sfnt_off00010a53.bin
da09d51d03da805647a0a950c569b68506e053eb40a087e9e4404bb1dc8b2201
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A53 17028 bytes
font_02_sfnt_off000136c1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136C1 16792 bytes