Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d201ce18abd13c2…

MALICIOUS

PDF

87.7 KB Created: 2021-07-16 08:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 55826e614b8686d7c84275cba8288a55 SHA-1: bf28c4b96992e1a473393d78e186bedb55a350aa SHA-256: 0d201ce18abd13c259c10cd6fc11784d31cff8f26a8f396bc59b0a0163f58486
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely exploits a vulnerability for client execution. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories, suggesting a phishing or credential harvesting attempt. The presence of multiple distinct hosts and the use of disposable hosting further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085a1fee8804---sorivubopovejagigawapi.pdf In PDF document text
    • http://sushikyototogo.com/uploads/files/gonomoposubi.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/48891956274.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608322484fa7d---85767572668.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/450498cfc67ce9929e32592d76aadb42/98772622349.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/53664186898.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/76bb19236cb26539aee73d9421af4008/25735545351.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/b83b1dd7a58d0c3984d2c57bccb48727/34875795875.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/c8dc4a043d886b0d98f968c423bf15dd/soniveze.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/tuzitusisenajapelujajop.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/2cde72663f0fc23353d1dc0172df1531/79798462990.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/xawujomupajo.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607051b2521d1---58710888478.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/900862a2250b60d388cab9033c84aacb/vopepukanesone.pdfIn PDF document text
    • http://bluedevils59.com/clients/862365/File/97928436245.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/pasoziduv.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/57679818464.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/tetuzozewos.pdfIn PDF document text
    • http://3sdent.com/upload/files/virewibokasepawagonabe.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16072045033cc5---75594242125.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733c63e19c9---guxipumut.pdfIn PDF document text
    • http://scholl2021.com/clients/1/19/19bca4f76d5065ca3bffbfc1c67e7925/File/dajej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=acetic+acid+and+acetic+anhydridePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF378 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8F 10228 bytes
SHA-256: 81f6bc661faea87dcf47e4f48d3c2094e1a8aed0aa62c5a7870627c209a50fb3
font_02_sfnt_off00012276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12276 17372 bytes
SHA-256: 7a445d0d4560b62fb2ef52629c68cd2262237f92ee8bf55dcebbda2266c7861b

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