Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbdc8ebece6519b…

MALICIOUS

PDF

100.0 KB Created: 2021-07-29 13:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41ccb7689044154740843e520c070f31 SHA-1: 273c13f3f001d933a67fea268526dbb2d8ba0b23 SHA-256: bbbdc8ebece6519b2d2f53ba7e042d7968f99b63e6e4d43d574d88cabd7e6bb5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of multiple suspicious URLs suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/f16ecb67ebf61965d321a2eaf6651b44/davimegabegoxesuzon.pdf
    • http://malbreil.com/userfiles/file/76034928282.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/aamm6qmu1g1b4c8pd1ema0kueo/lewetixisiradorit.pdf
    • https://beautyyaurient.com/editor_upload/file/xofaxajeg.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/77861339444.pdf
    • https://apc-algercentre.dz/ckfinder/userfiles/files/bugegilo.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607078877e664---zidifoxozuvikukimudopafus.pdf
    • http://startmatbaa.com/userfiles/file/meridejajuwefivurolil.pdf
    • http://alimentosldm.com/userfiles/file/ginuvobavesiraweg.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/t2ktdtm5hb6iujtg6iatj46g5p/fagakinitaterimupevefab.pdf
    • https://ancoraeducacion.com/images/37283186234.pdf
    • http://aelma.com/sites/default/userfiles/file/27382392781.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/991q4nl1v9g6vv0g8ar67j6gl3/dekudobulaxajixitepe.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d27eb754f---pojef.pdf
    • http://chukgoobok.com/files/fckeditor/file/notumejonigaxagotogaf.pdf
    • http://alfonsoguiggiarchitetto.it/userfiles/files/39085637762.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=cost+accounting+terminology+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012284.bin
ee14f8271efe3689aff66c5e7cbc95525a80001d21bcc39e9288a7a06df3cee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12284 17092 bytes
font_01_sfnt_off00014f58.bin
ab2febd43ed76566012a4e642da6d67996365b532ebc6e695319a19ba110ce76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F58 11208 bytes
font_02_sfnt_off00016971.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16971 16792 bytes

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