Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbab6197da3b518a…

MALICIOUS

PDF

82.7 KB Created: 2021-06-26 03:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 02e1bbe09bcdac52afd49416eaffc14a SHA-1: 514c34533901019ae0865bd76242db48665e00fd SHA-256: cbab6197da3b518a24b7edad307fcdd9f7ad37fc48321979a5f44c409190e4d0
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, indicating an attempt to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://triptoboloyfoundation.org/editorsfiles/files/40884322717.pdf
    • http://progfin.pl/userfiles/file/42772536002.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/qot8aqjo2g595t4686b92td56u/tuxodupanaporijugixega.pdf
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/zatoderokuvubirunoxikap.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bcb91c081---58746149976.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/53305304d6787de70f2341407e55c358/79864845427.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711f53bc588---216355696.pdf
    • http://renovator.cz/files/file/76180604570.pdf
    • http://www.toptehnik.si/images/68164135342.pdf
    • http://greenbrier101.com/userimages/dufobijemitedi.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1056ce998b---67955975017.pdf
    • https://plagij.at/ckfinder/userfiles/files/zokajajubajepo.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/lhemtlr9g2kccrc6q0s6dsdo2v/91314391540.pdf
    • http://slsnn.ru/content/file/9654881243.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b068b891dd---57724292278.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/d8b8e906cd1b3224f37eb7db7029fae8/18359803255.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/6f5ff32d9b7a7dc1092753adfa6a78b0/28853469214.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c69b7ba8fb---11755103902.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/3146fedb6880556db94212517676d093/46346529292.pdf
    • http://pritchardreunion.com/clients/81409/File/xuwigegeveg.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/0leh07jr4086ra8g62lbmfm8r6/75488172896.pdf
    • https://emprenderem.cl/files/sepowelag.pdf
    • https://nilsagame.com/calisma2/files/uploads/peziwuxi.pdf
    • http://magooferta.pl/uploads/fck/file/78304268722.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/b4274b3f794ba59d678c12f8d22269a2/jeneforused.pdf
    • http://jyjwqj.com/uploadfile/file///2021062113043648.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=the+3rd+movie+of+harry+potter
    • 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_off0000deb8.bin
de43b37e94c26926dea279a790c314c2ecf091008db2825c968591e7600b2905
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB8 17480 bytes
font_01_sfnt_off00010c9c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9C 16792 bytes
font_02_sfnt_off000124b3.bin
db1da5a65b959949df1e719f7c6967d1e403bd6437616f8d8f5fa911ad6ed904
pdf-font-stream PDF embedded font (sfnt) at offset 0x124B3 10760 bytes