Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01d2a1563bdaffb…

MALICIOUS

PDF

88.0 KB Created: 2021-07-03 06:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17ea06845fa9e209caae2695b84a1a13 SHA-1: 53589aeef21f950689e419ccec1c6e3040758fde SHA-256: e01d2a1563bdaffb4cc1c2c09485f4a76138b9c62893e8d20387bdce775b9214
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the download or redirection to malicious payloads hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://shipagents.nl/uploadfiles/file/bosedenidalubupobesij.pdf
    • https://dynasty888.com/image/files/20210702_212409.pdf
    • http://aaaexpressheating.com/userfiles/file/lipuxilax.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/khd1irsiijoin4frvh28015g04/fixowewajulove.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1e7b37941---rizepegotam.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b9854a544---fazuvudewofimagajebiko.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0721bfd78---sevozevil.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/53bc21939167012c0ff3e780ee671e91/94780856819.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/8ecc6b963c3580b583330a6dbae3bb10/42190740417.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a36ffd99923---75682011916.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/d51bea318983fe375dda6c595443b851/dezepubiwupapozosi.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/89catdpk6dmsku6tlj2ml5lveu/3272772074.pdf
    • http://ototavandosemesi.com/resimler/file/16760078571.pdf
    • http://grandrosso.com/js/upload/files/wufojopusajexug.pdf
    • http://easyreturn.store/userfiles/file/wowedewufumifadegufoj.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839590a24fd---dudezizus.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/io8l6ltqbdljhqkf0dan1rpaj4/96284764761.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7563651ea---vezirizobefij.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/150b57566c6d6c1cddd557d53b0d95ce/foxuwezilofe.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ma4idfco44q4f8f44p0a6k4qn4/pudowegami.pdf
    • http://ansing.nl/userfiles/file/domedoximugewosizag.pdf
    • http://osteriailgalloelinnamorata.com/userfiles/files/dadig.pdf
    • https://ovalpolycoats.com/media/95907368122.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0cbfb09aa---nivotogafibe.pdf
    • http://www.awakohchang.com/image/upload/File/3966169667.pdf
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/wixobosav.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b626c61c07d---64644558359.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/bd9d62ebd4f3abfad8fe06f3a78263b3/5048945096.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=donate+clothes+to+charity
    • 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_off0000f4ae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AE 16792 bytes
font_01_sfnt_off00010cc0.bin
54cbbf8cb3a0d50978a8e96812fb2af76434670108b738c440336bebfbb93cae
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC0 17868 bytes
font_02_sfnt_off00013af6.bin
e59ea0505926a29d40b79efce6417e9267799952c6cc22ec9c816b0a74296b59
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF6 10440 bytes