Malicious PDF — malware analysis report

Static analysis result for SHA-256 1013e1c0c0b3c777…

MALICIOUS

PDF

86.5 KB Created: 2021-06-26 01:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6eabb0dbb938e256ad2f8724f085f120 SHA-1: 795e6ea53c7f949454ecbe1a01054d1239340c4a SHA-256: 1013e1c0c0b3c777f99b3e581a37c437f0145ac7d01b7206935cd2ae76a8bf47
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress upload directories, suggesting it is designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0275

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://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/4c45923f63b2cdb6742996a6aee3431f/86691244900.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/9k7lreohflngmhljvcm3rcrne0/67232345656.pdf
    • http://jedwines.com/cmsCart//upload/file/guwizofe.pdf
    • http://skolicka.eu/foto/images/file/vibudimonodof.pdf
    • http://debandhelder.nl/ckfinder/userfiles/files/80860352720.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090d5a70c84d---nawakulunotitadukam.pdf
    • https://vildmarksjagt.dk/userfiles/file/45739624853.pdf
    • http://xn--o79av69abka850ab6c.com/upload/file/202105261602263004.pdf
    • https://nicosiacaffe.it/file/42472232525.pdf
    • https://noihoithanhtuan.com/media/ftp/file/34845059025.pdf
    • http://elturo.ru/img/upload/files/96350259094.pdf
    • http://synowka.pl/galeria/file/dejirapezeru.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/c136c39f469fc4158f2459b1e9044a61/nevegor.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9248dc6c1---90088973637.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/f3a0661dab6fc9dcf029dd3694f4dd54/31550533018.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a461d0d7d74---99998786754.pdf
    • https://areicon.com/images/file/4295077269.pdf
    • http://allasclub.com/campannas/file/597352792.pdf
    • https://systematix.pl/userfiles/file/83014446051.pdf
    • http://littlepearlbooks.in/data/eimages/file/88291157617.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609042863651c---64374702344.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/3a5e26ad3c600a9742616f42739d089d/16765083591.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=enthalpy+of+combustion+of+methane+graphite+and+dihydrogen
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc40.bin
a4712ff20d76d4c5a9e4411126d91ff01c74b84580aeca609c0999c854fbd56f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC40 11404 bytes
font_01_sfnt_off0000f684.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF684 16792 bytes
font_02_sfnt_off00010e96.bin
41cf393297c61743a9eb9336917213c4a4f29979e52916e0a585b58c1e19773a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E96 18696 bytes
font_03_sfnt_off0001402f.bin
450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1402F 16088 bytes

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