Malicious PDF — malware analysis report

Static analysis result for SHA-256 512faf4d78e2e3bf…

MALICIOUS

PDF

74.2 KB Created: 2021-08-25 00:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34f0ebb3890e1d5c4f9c41b64a56a63f SHA-1: a1b59afd8d9475fa11a4dde2a9e920e90f846034 SHA-256: 512faf4d78e2e3bf6a5432b71791375fe8395c2a71d643d2689e6efa69355839
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common tactic for distributing phishing lures or malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery. No scripts were extracted, but the structure suggests it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8681

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.
  • 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://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/2982b89b22ad348a81f55827581473b4/jesowosu.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/68ff8a8f297a516300a90708b3cafe9f/3327998577.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160873966c8f90---dupokitojisexulidifanevo.pdf
    • https://dancleland.com/img/upload/file/nalidolebepulolof.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811b81f299c---92646471977.pdf
    • http://reikihaus.com/clients/75291/File/64806388702.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2cdd1fc24---61874187122.pdf
    • http://aquamedia.cn/ckfinder/userfiles/files/62922452851.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610dbc3802071---72723573699.pdf
    • https://secolink.sk/userfiles/file/13550006733.pdf
    • https://eobliecky.sk/userfiles/file/55939231985.pdf
    • http://flemingfamilies.org/clients/8/8a/8af36a28baf44bfc7b8a7004fb4eaede/File/moxadominikoji.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/2rg3vihhd1ovq2vchuk3dkas3k/wekemipu.pdf
    • https://mamap.in/ci/userfiles/files/54520425110.pdf
    • http://samromschool.com/UserFiles/file/80152841333.pdf
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/43675273443.pdf
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/zagifiza.pdf
    • https://inverpalmas.com/aym_image/files/xuvisutuliman.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36061e04fb---65088288976.pdf
    • http://komputerzagrosze.pl/userfiles/file/6800267617.pdf
    • http://bolt.fo/public_html/userfiles/files/padubotevutekuli.pdf
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/pamam.pdf
    • https://facades-et-traditions.com/actualites/file/duroxidudu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=2021+new+tamil+movie+download
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e919.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE919 16792 bytes
font_01_sfnt_off0001012b.bin
2714a098f1f7cee02003d3cc08458e6575fdbcc394938e7c69a7f0daa01b66c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1012B 17256 bytes

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