Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7abb49ba1cd6cf…

MALICIOUS

PDF

85.2 KB Created: 2021-07-17 09:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc50e97e1226df68a3e29443fa5962fe SHA-1: 8d2b7fefc7668a0c7fd28024544ce4178b800b26 SHA-256: ee7abb49ba1cd6cfde7b359577f073780c23791866160073032bcf47d7b213f6
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://veiligheidssloten.nl/ckfinder/userfiles/files/70854450890.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/a8b9555e05278696ae214ff0f6a2f756/2699803016.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/9rsuhfmfi3ova7rhqlto7kr1c8/83046590418.pdf
    • http://files.ibiza-ferien.de/file/70384060325.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608688261dbc7---tenenetesidaz.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/8a263667b5a20419bc59306f8b5afa66/45895233641.pdf
    • https://adikkedua.com/contents//files/kenofof.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c64e76bbe7f---zawududurebozip.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608563e992655---96732139510.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ejt0dugeshikeart8brokdt4h8/14126528831.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/8bfcda5e8e55a1de7e5a90e5d3b51853/44966367268.pdf
    • https://maturana.cl/upload/file/42922621458.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/06eca243a25745a155552fff5a83437b/45918098926.pdf
    • https://schmitz.cz/res/file/sifixexubebujinalopugo.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b208548a3---fevuwafobemivuwudemofupik.pdf
    • https://aydin-elektrik.com/resimler/files/70561290936.pdf
    • http://wonsakai.com/uploads/files/92863571472.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/ieheectua1vvdhfmh6ommb1kl7/8981150226.pdf
    • http://forter.vn/hinhanh/file/puvatobopuzanefapurirume.pdf
    • https://hgb.se/filer/file/79630076042.pdf
    • https://ev-owners.jp/userfiles//files/68425277585.pdf
    • http://karimeh.com/public/userfiles/file/45752277279.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/9e514c7f480e7adcead5b7c142855e3d/4634439573.pdf
    • http://tms-technology.com/ckfinder/userfiles/files/44068271865.pdf
    • http://bright-mineral.com/uploadfile/file/2021051522132236.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=cook+chicken+in+microwave
    • 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_off0000ed85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED85 16792 bytes
font_01_sfnt_off0001059c.bin
d523e59b9f37ac552f669944d1ac94c7015f389906d91b9bdd3aa825f0925872
pdf-font-stream PDF embedded font (sfnt) at offset 0x1059C 10456 bytes
font_02_sfnt_off00011d2c.bin
573a912ad5e5f19e5ee96b4e7a11614649f0d87f12d877ca55dc9a246db548b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2C 16400 bytes