Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d141e03b239c9d9…

MALICIOUS

PDF

99.5 KB Created: 2021-06-30 21:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de9ed67d97e5c87c633e60284153730b SHA-1: 83583286b4d970eb34bce6a6b2f0b6e670907501 SHA-256: 4d141e03b239c9d9efb136e5a2c765703daf74598451f39091bbfd3ca11f79d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple compromised WordPress sites and other disposable hosting domains. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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 https://infrive.ru/uplcv?utm_term=justice+league+crisis+on+infinite+earths
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc73ba73c1---supap.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f5c13e6ae---88823839158.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/c40f320ca1ba585e4599f97ec4cce88d/juporuxivizebidovuperasa.pdf
    • http://grandchainfamilyfoundation.com/clients/85333/File/butakosujososo.pdf
    • http://lnshiyue.com/userfiles/file/20210530053549_790531603.pdf
    • https://t2sc.me/userfiles/83276697487.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/8ddef28ffcffbaedc06340c16b34a05f/72784665753.pdf
    • https://cmfnepal.org/userfiles/files/niziraxaziba.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c5f618cd9---34592480743.pdf
    • https://familienbilstrup.dk/userfiles/file/vegewuxoroxezapezag.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/0625ad9bb050d58825d700c899d451cd/vutinipilux.pdf
    • http://smiletoursvietnam.com/ckfinder/userfiles/files/73720028424.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/1e7f02df90b88c48a49308dda05eb562/rurufogurosofibupekibal.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb967e860a---66054175579.pdf
    • http://kimyasaldubeller.com/upload/ckfinder/files/93489355160.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5a1c4fc3b---lisewamiwowimupavilaj.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/8faac029dff65c5bf51300018c32c4ac/kesowotogawilu.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb0c4ad7ac1---semowogakazogapenorumi.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160868ecfd65e1---jazuvuzevinow.pdf
    • https://lawrenceyezersky.com/userfiles/file/jomusowilo.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608b44eae604e---23030549223.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2252dd3dd---53563711051.pdf
    • https://egyptsuntours.com/userfiles/files/73549739534.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010878.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10878 16092 bytes
font_01_sfnt_off00011dbd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBD 16792 bytes
font_02_sfnt_off000135cf.bin
c829f2912d44c0f503fae5900be5b503edb906458954fdc903ba91ea1e448f4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135CF 18156 bytes
font_03_sfnt_off0001659a.bin
835c5a8cea98074e238ea72416470261f61be2166d220069e38cc35dd2f6dd79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1659A 10704 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.