Malicious PDF — malware analysis report

Static analysis result for SHA-256 540a003029cf243c…

MALICIOUS

PDF

93.3 KB Created: 2021-07-06 08:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d790b951c84f6455bdf3d3f046e4224c SHA-1: cd5615dce2903b41039b510e05427b44fa3fb49c SHA-256: 540a003029cf243c4e7d3a65575c9506e3c556e1126384f3044f66193572b353
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The primary attack pattern involves luring users through a malicious attachment to a network of potentially compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://orbitsecurity.qa/pro_mvp_tech/uploads/file/80119315738.pdf
    • http://heyumpnd.com/userfiles/file///gutox.pdf
    • http://aps-mes.com/files/file/31047451760.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/4bc4dsr0nl2bc9424150ehektb/64065139296.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b93298c8a8e---munuzadozumafenovajeden.pdf
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210624155857.pdf
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/96686876370.pdf
    • https://kvkumariajnkvv.org/singhania/downloads/file/88334438573.pdf
    • http://pm-property.pl/userfiles/file/18533086889.pdf
    • http://lineshare.net/upload/files/20210703090506.pdf
    • http://bomtvplus.com/data/board/file/20210528043430.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/1d6ea25e3b0855bfbbd1b570ba998a3b/kegekugubunatixoruxiwomid.pdf
    • http://luatsutiengtrung.com/app/webroot/uploads/files/rivis.pdf
    • https://taechoclub.com/FileData/ckfinder/files/20210619_0BFD7AB093873238.pdf
    • http://maybomchuachay24h.com/Images_upload/files/87680888192.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40242c15b4---29954966788.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/dcd15e3bf81994dabb8de68152e827e2/nakabunavovawokukax.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/osek37m6ncrjeav42ih241ildr/pegawevuwuz.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/0e86621f643084556454a8b74bd2cdb5/7267812840.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609831090ed2c---25799436700.pdf
    • http://blissworldbeauty.com/newerac2c/userfiles/file/83609862523.pdf
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/kozizi.pdf
    • http://poorclarescork.ie/images/69621845548.pdf
    • https://bselink.com/userfiles/file/23223006122.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b11dba3f9---sogebonefefirubipila.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=eulogy+for+my+father
    • 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_off00010b05.bin
634886a533e64e54d12c4ec70a4a09717a46679aafbebb62b38893db3458de06
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B05 17296 bytes
font_01_sfnt_off0001380e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1380E 16792 bytes
font_02_sfnt_off00015025.bin
420e5d396156255a5efac5d305c7a0c0e08a0eec9d5a4ea9b6d02a2e05bfb514
pdf-font-stream PDF embedded font (sfnt) at offset 0x15025 10492 bytes