Malicious PDF — malware analysis report

Static analysis result for SHA-256 94cd592ebf4fd348…

MALICIOUS

PDF

73.5 KB Created: 2021-06-27 13:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 703d44861729db1e5cb75dce7f98169c SHA-1: 30bce0247411d01bd0c1ded34e58b27f851887bc SHA-256: 94cd592ebf4fd348831c6647289a81dddeda7473c81cf29643632b5a77f0c098
176 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS uploads. The 'SE_CALLBACK_LURE' heuristic suggests a potential callback phishing or tech-support scam pretext, aiming to trick users into interacting with malicious links or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a775c4343dd---tadofivobagudol.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608cacda953d8---vumob.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/03af677ada92d162364b8c086a4efb8e/sijasifarufolozu.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/iijijodobhslku3sv8te3tqd86/17370253868.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/8j5vk81vc3060nu9b9m4v09nh0/dozeporibubebuxatagan.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb34994591---wibabukijusapa.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/1f691f9957836dff77f77d5c57313de6/xemoxevexet.pdf
    • https://zoorichi.com/temp/fckeditor/file/60619995301.pdf
    • http://geodez.com/pliki/file/posatozebomase.pdf
    • http://batiment-tunisie.com/userfiles/file/bekuj.pdf
    • http://alfavit.tv/userfiles/file/35939656164.pdf
    • http://language-coach.pl/uploads/files/muvasixekuledotafeku.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608470c0e7f45---befinofoz.pdf
    • https://bangprice.combangprice.com/beta/cms_image/file/jurodosijogupe.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16094e927b6c35---fexuzewurote.pdf
    • http://lucann.com/Upload/file/67219172258.pdf
    • https://motelandratecuci.ro/userfiles/file/murid.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722d3bcc0fc---firiliravanaliweletom.pdf
    • http://15449010.com/FileData/ckfinder/files/20210622_0621269C97C2A18C.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=rose+hill+nails
    • 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_off0000bfa9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA9 16792 bytes
font_01_sfnt_off0000d7bb.bin
edd6c2b2ef3e3372902e37395d45ab4984a7d76a949ea53c891559024bc76f0d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 16752 bytes
font_02_sfnt_off0001031a.bin
0591088444bb639f4640eef15e27ceefec52f85a616796b9a50a470074830417
pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 10052 bytes