Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa47af620761735…

MALICIOUS

PDF

79.0 KB Created: 2021-07-06 14:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b808c1d178f69805ca553cc0a22aa9c7 SHA-1: a91010caa666a103c77551bc3a1678bb3dc12bde SHA-256: 8fa47af62076173581993f79242b1d0b9c90f2d7529094273141a588ee6fd5ca
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites. ClamAV detected this file as Pdf.Phishing.Trojan, indicating a malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are presented as a link farm.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16071dafe82788---wujinuwidixigu.pdf
    • http://www.ufolep-69.com/contenus/files/mimadelaxitavafoz.pdf
    • https://binhvi.com/upload/files/vijefet.pdf
    • https://ancoraeducacion.com/images/62812839081.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/7fbf9da42e4689c50b079c6f8ac87c84/wizaluvasopi.pdf
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/1770127804.pdf
    • https://rajatotogroup1.com/contents//files/73772676040.pdf
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/nigojojodeve.pdf
    • http://edanieltour.com/FileData/ckfinder/files/20210623_0257BF5A67B7D7E4.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/d8dc7c4f4bec0c889cf5a23a7b04b117/11256176445.pdf
    • https://farmaciasacoor.com/site/upload/file/24366765166.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/0c3bbeff530becdf08452bef737a5b6d/zegavanoporilu.pdf
    • http://msiutilities.biz/documents/49653127029.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad947f3d27c---fejako.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d273edd724e---88786057952.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160905b41d5e36---kunolak.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/57f46c66bcc65e3d4683f77c8c1ce9c8/xapovaluvowezipikapug.pdf
    • http://webdulich.com/js/ckfinder/userfiles/files/karawojufuridijofe.pdf
    • http://boathousebrokerage.com/userfiles/file/toxakezesawa.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a80e44d4f21---68734242526.pdf
    • http://bindashnews.com/userfiles/file/vibova.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f02578609---25545720098.pdf
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/15495967423.pdf
    • http://applecentervn.com/uploads/image/files/14327707994.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/4kbttujvgm0fd7l9tccqq34aq7/voruxadidujowe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+make+a+diode
    • 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_off0000f7df.bin
2c20627a84d9400afbed5ae8efb778e4ad203542b83e3df616d6a69da294c278		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 17324 bytes
font_01_sfnt_off00012546.bin
53f9996fb5b7a1767c57142572122ee3923dfb7f9c77d87ca651beec1032a1e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12546 10160 bytes

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