Malicious PDF — malware analysis report

Static analysis result for SHA-256 d322750f6673b632…

MALICIOUS

PDF

91.1 KB Created: 2021-07-02 15:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 51d4a9fbe524f6de732a800b5642e7e5 SHA-1: abe13d392857ef8a192883f76d142b6d947c571b SHA-256: d322750f6673b6326bac7dc21e9b5536b059397bd94335a1ff6a10f746ed2650
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ozkayalartrans.com/userfiles/file/92482143753.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bf9e6a2dd---65869942481.pdf
    • http://profitoolinfo.ru/ckfinder/userfiles/files/6665915781.pdf
    • https://koratspring.com/upload/file/telaxazakugabalifuzasu.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c891312a0a---vifarenamunipag.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/678410307c5d97d20ad6655d8353560b/dupibeluxo.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83de6b512---43678886469.pdf
    • http://ahchala.com/img/file/xokakoxuturokobazetegewem.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6107334f4---tulimeraveponebo.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/450ced6a1a4e18be456ad0bef321dc15/59974258678.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160864b8220746---19605495471.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/4a76989d7749af389cbbd6372fcdeaa3/6391913059.pdf
    • http://shinies.ru/img/lib/file/gitekatuzekojunedatis.pdf
    • http://c2ctrading.org/cms_upload/files/82130880372.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609318f91a06b---pusoze.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070734f7e24b---36913230307.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/da0ff96f6838cfe88a7d9c4ea043eb3b/42273361866.pdf
    • http://praconsulgroup.ru/pict/file/livowisirakilura.pdf
    • http://notarbrazda.cz/userfiles/file/foruzesosefizuzesixi.pdf
    • http://southport1969.com/clients/861680/File/9639734876.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16098618bc8f8d---64642170547.pdf
    • http://i-daa-wl.de/userfiles/fedoju.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16081f0dd50cb2---kolegasogoj.pdf
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/jatojuragabipir.pdf
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/d32fb68007cd66864265c0cd5c21a197/62828264622.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=manual+testing+projects
    • 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_off0000fe3d.bin
a440c08292e52b2d46cc0a32666ca0f9b90499896e76a8a14fcbf52dd2779a5e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3D 10772 bytes
font_01_sfnt_off0001171e.bin
c674004f07c9b9d60c3f12926d4abb79a7a35dfc94beea4dc83bad3c770eada9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1171E 17668 bytes
font_02_sfnt_off00014598.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14598 16792 bytes