Malicious PDF — malware analysis report

Static analysis result for SHA-256 da149500a92175ba…

MALICIOUS

PDF

62.7 KB Created: 2021-05-04 04:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edf63107781e5fb9897e0124fe8f2a89 SHA-1: 8e642f2bffbe4db3b0c1758763b49017306435b1 SHA-256: da149500a92175ba379c9b7bb7d06a04cc03cf80870d08751494300663358b87
154 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS uploads, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted, limiting the analysis of specific execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8464

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tjtru4rfrraeeqcobii14tgd6b/bazowefatopolimoxise.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb50918c8---5765233466.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/vq99p37rte3naq0464oobc02d4/wuvipawakune.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160736be5e9d28---3594688130.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/7fc6f45c9bfde6db40d06a73b64f9889/lavuzosijutenu.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608831f90cbdb---ropab.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e953ca22ec---75171801755.pdf
    • https://loctra.net/userfiles/file/witolexa.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608501358bba1---toximemilavedonutej.pdf
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/ujskep5ivjje08km9c7scc99h6/tozak.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/vp60oaambo9b1pl8b4jps4jnr0/sefudesivev.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a5c262949---25335253444.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2d2913cbe---fopajifel.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/ce5c2be0c18ce9ad4dc00b879479c6e6/36998742609.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0372096eb---94071933753.pdf
    • https://amd-export.com/site/upload/file/wumifigidiros.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2177c9ef890fc1b448d0090c3111959e/17382364842.pdf
    • http://aelma.com/sites/default/userfiles/file/kakirabebarafow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=instagram+direct+app+android
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d268.bin
431eb9d7545ad830c06eb4e86bd934575a000cc8b59d11ca9e59a14ca17186c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD268 5300 bytes

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