Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d244b73c540788d…

MALICIOUS

PDF

71.0 KB Created: 2021-06-27 01:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e89b305508036c38d7410ba684431279 SHA-1: a6dc532fea50ef27e00ec0649a48b2a319aebb2d SHA-256: 0d244b73c540788d2cecc73cebed02e6c6e9bef1826bf54adb4b6f217ded93b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, many hosted on compromised or disposable domains. While no scripts were explicitly extracted, the nature of link farms in PDFs often involves JavaScript to facilitate redirects, suggesting an attempt to lure users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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
  • 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://sun-green.nl/ckfinder/userfiles/files/8846261841.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/d14ce7dd6bdcd606f20bf313d9b96588/vunodimaxejugitemopuku.pdf
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/17036727686.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077910b564cc---pimeki.pdf
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/biwapamini.pdf
    • http://stalmost.pl/userfiles/file/pisasarakasisewof.pdf
    • http://kaztelcom.kz/ckfinder/userfiles/files/67403780868.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081aec152851---vibemidefegosujo.pdf
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/55405667480.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb0847db9c---69062183461.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/6d091c8f141ffe096618771a583b6852/xoxobajojipuferufo.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d07cf2a58cb---86487507388.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/0445d21379e424edd675c4c555268bdc/mupixosuxobigovefose.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840f14be7f5---wezogizo.pdf
    • http://yomamasushitogo.com/uploads/files/punusovobolebebezokunabi.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/5784abdbf5e5c01cdb0700581147a931/36843445269.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16070a9d2c417a---11402729734.pdf
    • http://maility.pl_adresuserfiles/file/legoxijolidasevo.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/io7i96l58lav27niojv6p4rulu/97446017644.pdf
    • http://tvkinter.com/file_media/file_image/file/95292441036.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/0e4e16f1a985b305850021160e4cf3e7/67479702725.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=sunflower+clipart+free
    • 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_off0000b77e.bin
ce98d63d6e55e57cf843067167040bed300564a52d81e1219c5ebe3d2e5ebb7e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB77E 15316 bytes
font_01_sfnt_off0000deb6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB6 16792 bytes
font_02_sfnt_off0000f6cd.bin
24782341581fcd2d53137e456a3cab2ab52957b990ffba18f1919e1eb99f7eb6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CD 10568 bytes