Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a1f64f5110a35d…

MALICIOUS

PDF

80.2 KB Created: 2021-09-20 04:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 30f6c45b1cb1e83c79a039de66b8b42e SHA-1: a276ba47eae83f38d0b8c1f3a2e8d852c847ca14 SHA-256: d2a1f64f5110a35d0fb732682a4786481d6921eedcb7b48ffdfc72a5fa1be4d0
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the execution of further payloads via the embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://wastran.ru/uplcv?utm_term=speed+post+time+from+india+to+canada PDF link annotation
    • http://futboltotal.net/images/files/bosorowivolakod.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/15081014932.pdfIn PDF document text
    • https://geniodelweb.com/file/kidomom.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/baloruloxopuvavofad.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/1d4a6a3892a0d23dbecaee5245320998/xogexeviwesimomusovul.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614087501454e---wepulezup.pdfIn PDF document text
    • https://miltonmattox.com/userfiles/file/75515790914.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/lofun.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/jegupogetopagazasi.pdfIn PDF document text
    • http://www.farmaciavictoriayjmleon.com/userfiles/files/30740140755.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/sirupavepororolaz.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/52991481981.pdfIn PDF document text
    • http://turchifiltri.com/userfiles/files/xubejegona.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5f209366d---47476980318.pdfIn PDF document text
    • http://mcutech.net/files/31656782822.pdfIn PDF document text
    • https://kar360.com/resimler/files/24501858247.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/mukavelowelinatozupeb.pdfIn PDF document text
    • http://swancentive.com/cote_dor_import/admin/ckfinder/userfiles/files/20600155787.pdfIn PDF document text
    • http://chinalabware.ru/d/files/zuwutalasosoxuvede.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613edffe6991c---wozemerejewezibezedamopo.pdfIn PDF document text
    • https://edenestates.com/ckfinder/userfiles/files/jivejotawuw.pdfIn PDF document text
    • http://intrinhgia.com/admin/webroot/upload/image/files/nazipivufakovosematapurig.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/zesijejivubamubo.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/mixobujiguxekoxito.pdfIn PDF document text
    • http://retailcop.ca/files/10510865007.pdfIn PDF document text
    • 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_off0000d50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED26 10812 bytes
SHA-256: 818faa3bb530a486073eefd3b40e0717f4d53da700511f7daf97b09b39b28264
font_02_sfnt_off0001060a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060A 17476 bytes
SHA-256: 538dca516fe4cf805a6868c8ff23b87d10aa785a61f9171c15ee8ceec3351497