Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed58231ee0f9ef8…

MALICIOUS

PDF

85.8 KB Created: 2021-09-17 10:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a085fc16bbdcec9ea8445489c102a06 SHA-1: 2ebacf03b3e13e1cc6a29b8f1e4a838b3e8fe0d1 SHA-256: 6ed58231ee0f9ef87d1bba5b152722ab7785d8f276ab6647da9d2df8c63aef8d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF that contains a large number of links, many of which point to websites hosted on compromised WordPress installations. The ClamAV detection indicates it is a phishing trojan. The PDF's structure suggests it is designed to lure users into clicking malicious links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4503

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 http://skinct.com/upload_file/file/Fl202109161729444860.pdf
    • http://sxhk365.com/uploads/file///28194764553.pdf
    • http://cdwy028.com/uploadfile/file/20210911062446.pdf
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/miwixarowojimodetuxoxab.pdf
    • https://tekmaker.com/upload/files/budawesugeba.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/o9amt1okdqh7i4od1nvgqg6uei/52488797666.pdf
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/62325260688.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ea35e279f---83731425648.pdf
    • http://nct-vn.com/userfiles/file/zigujimubotunosu.pdf
    • http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/bekiwawo.pdf
    • https://es21sys.com/userfiles/file/92200974832.pdf
    • https://hohsingfiber.com/ufiles/files/kerekupokojokoxutexefu.pdf
    • http://millionsdiscount.com/mo_images/files/nivususidejunazutu.pdf
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/95107938798.pdf
    • https://mancomunidadvaldizarbe.com/userfiles/files/rifovemefi.pdf
    • http://kitpaisal.com/mypicture/file/dotinufenagapulof.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1a7a13735---xaxukanawapuxuzajawoweno.pdf
    • https://speedwayinfo.hu/uploads/file/78438657721.pdf
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/80363567390.pdf
    • http://ergakiland.ru/files/files/jorewifuxuf.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161315b2fa40f1---63045571451.pdf
    • http://bagliodeimille.it/userfiles/files/30776940506.pdf
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/zexeke.pdf
    • http://abwcockeysville.com/uploads/files/99917551091.pdf
    • https://edex.co/userfiles/files/kapevofizizabuxe.pdf
    • http://meble-tk.pl/userfiles/file/68882080641.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=life+history+of+william+shakespeare+and+his+achievements
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000138bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138BF 16792 bytes

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