Malicious PDF — malware analysis report

Static analysis result for SHA-256 09700b8d77fe6f45…

MALICIOUS

PDF

568.1 KB Created: 2021-06-25 19:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f97c7836743576324ced5b0249d0ea4d SHA-1: f59de42a594803c8dbfb3145d89339d02b72c54c SHA-256: 09700b8d77fe6f459b5b22205549d1f08bd153862842a1ce5f7acbc8b1bc0a37
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host and distribute malicious files. While no scripts were explicitly extracted, the nature of the links and the detection suggests the PDF is designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7670

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.
  • 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://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ab00d38fbe3---vagelenejikofub.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97dc88d6c---nesijeribabex.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53adfbe683---90114225455.pdf
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/84811664715.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e58c68fe2b---47833517642.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/3631bc87c3cbdfc583e280b4824a7ffe/fifofekibenamim.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3523bd7ca0---13978659446.pdf
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/4609860751.pdf
    • http://capri.lt/userfiles/files/tawujeni.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/pif4s9gaqcjer7cv699krohar6/52680476638.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607581f85769e---mixijoxe.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c519b959c---66572993449.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f669b2b62d---melobirizakevofodufupuju.pdf
    • http://ersatzmonitor.de/userfiles/file/61031559216.pdf
    • https://akproauto.com/nbloom/fckuploads/file/89761412290.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f3af01ca4---butitowatevigewi.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805008a9310---fudesedekotolesokag.pdf
    • https://dm288.com/slicice/file/96037372633.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/14ec35fa90f39e812c2a8b140a8fee34/divomewutatowasuvubi.pdf
    • http://sunnysolutions.it/uploads/assets/file/debatepivikuzilozomak.pdf
    • https://xn--nmqu14inmf.com/upload/files/3581406285.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a65f2b007---zuwiramotununoleragamip.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/e9db26057ca9406757a68d719ee3c4c2/wenopalewidos.pdf
    • http://pileshoppen.dk/userfiles/file/rimematuk.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/4244bbblve3kqkkt7b8nu1q8g3/87039071570.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=labour+relations+board
    • 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_off00086e49.bin
6ff75e324ce56b9f465314ea8bc2c57b69ad5aed7cfe3982427ba3649c1fed0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x86E49 19552 bytes
font_01_sfnt_off00089f9d.bin
5c13e2fad43c5f5e880b309e123856d03be983c82abcfa8e52d742234b1cb8f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x89F9D 10436 bytes
font_02_sfnt_off0008b766.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B766 16792 bytes