Malicious PDF — malware analysis report

Static analysis result for SHA-256 4271d2e5d37c15e1…

MALICIOUS

PDF

84.0 KB Created: 2021-06-28 21:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4c6fadfa9c394b2b1cfb03b22be52a19 SHA-1: f49c78bedac2ba865a574611780cfc933eacd90d SHA-256: 4271d2e5d37c15e14c72a37bb658b6ef5301e64e48345ef0a86a88fdcd743270
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, including one pointing to a compromised WordPress upload storage, suggesting it's used to distribute malicious content or redirect users to phishing sites. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit users through deceptive links, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/1423ee6a5636bd5d4e7c5bf5750c86ca/faxifezuz.pdf
    • http://drentmedischadvies.nl/uploads/files/14437189598.pdf
    • http://alnoorcity.com/userfiles/file/70144437086.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b95030c13fc13f31addbf14558b6cd4e/rilolera.pdf
    • https://miguktour.com/FileData/ckfinder/files/20210625_360D9140E3F6E1F4.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/1538d14478812f65381d3a59c764abf7/8365290225.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/fql9ove6pjffo4motfe2ju4kef/tipujoribej.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8be50af1033895a84fd13e381a647cd9/riwenenulikowikufezave.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081009af3fb1---3214795635.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a2438b39e56---jupopa.pdf
    • http://a-swiss.com/upload/userfiles/file/sotes.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/fff683f367e9d571905617d2657064df/67784195258.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dcbfc30038---sizarivefeniwuwevoka.pdf
    • http://radio-salsa.com/php/rs/filesupload/file/31772858043.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f577d2a757---jevenezugizo.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607eae5878fe8---nufegitobuvukokuk.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160779d23e80c2---65389934606.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/09cf6c8272836008314d06d54e4527e9/texegozofoleborefeta.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/014f8a5e659ad39d3ef374e02e8bbb3a/82641423059.pdf
    • https://hgindustrial.eu/userfiles/files/ripizexakuriguxoz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=dotnet+interview+questions+for+2+years+experience
    • 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_off0000e674.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 16792 bytes
font_01_sfnt_off0000fe86.bin
82a7ebffe819c3be1a7546ebf59347a158f1dcc54ddaaaf33f9e5c46e3a407f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE86 16396 bytes
font_02_sfnt_off00012883.bin
69185da7b9dd770fba3d2bbb8f9a3ed703f406153adcfb867bf7a28697753bbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x12883 11160 bytes