Malicious PDF — malware analysis report

Static analysis result for SHA-256 268ebc79db3f8901…

MALICIOUS

PDF

106.5 KB Created: 2021-10-08 11:33:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 10e5280d4428e188c05db5e5c3740b27 SHA-1: 1917d5aaadf209f613815ce1237b860016dc1e03 SHA-256: 268ebc79db3f8901e37edd1e302a7f5e4d967b559532659de64d8580729b2830
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a pattern of using these sites to host or link to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://catamma.ru/uplcv?utm_term=toddlers+and+tiaras+full+episodes PDF link annotation
    • http://qdcmd.com/data/files/vitijiwikuvinusav.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/73922162881.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/11224475474.pdfIn macro / runtime command snippet
    • https://brod-plovdiv.com/images/68279575913.pdfIn macro / runtime command snippet
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/f37ea93d0c0d521cc1135406d859f68b/medenifivologin.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405b6d23ac9---joditadomutewoxusomew.pdfIn PDF document text
    • http://sino-web.net/filespath/files/20210905211322.pdfIn PDF document text
    • https://cristalensi.com/public/File/31171306143.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/86277251135.pdfIn PDF document text
    • https://nikunjfoundation.org/ckfinder/userfiles/files/sidemorexameduwodolilize.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/zotijuxipawejimamefuxire.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/tatibupugevezije.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152317871105---75917259450.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/senupotoxozifaxiwu.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16133f2a8788c6---72119143276.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/89443398996.pdfIn PDF document text
    • http://weldingplaza.com/files/file/30108621971.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/vufosesed.pdfIn PDF document text
    • http://dreamscar.eu/userfiles/file/52624844673.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/12614482851.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/f60c381e3624306f6ff07e2137f1d9ce/85210119742.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7d9915565---66673758249.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/lemuwewupituralopar.pdfIn PDF document text
    • http://anael.fr/fckIn macro / runtime command snippet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13566 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D78 21060 bytes
SHA-256: d89e150052b3da8d8d01e598bb342debbf979d27387bc1079730e74653afb2a1
font_02_sfnt_off00018416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18416 10556 bytes
SHA-256: e293a8bc6292313e8c7311abef2da80e5b72ef89167216abfa7ee51735f6d2de

Open this report in the interactive analyzer, or submit your own file for analysis.