Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d6d1d4a1629bea…

MALICIOUS

PDF

84.8 KB Created: 2021-07-04 05:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 152a6ee92b35742a2b5b081c6e46dfaf SHA-1: f09ef00c6b260e451a1f42b204fd0550308e6077 SHA-256: e9d6d1d4a1629beaf044198f7c1050db50abb1895a9416ad6b545fb61da70acd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links to external resources, many of which point to compromised WordPress sites hosting other PDF files. This behavior is indicative of a link farm, potentially used for SEO manipulation or to distribute further malicious content. ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2724

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16098432844814---sowapef.pdf In PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/c86437f243ba9ca2866cccfc6eb80dcb/xoxasav.pdfIn PDF document text
    • http://s-moonlight.com/CKEdit/upload/files/5928739138.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/defosonenokitizidete.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/28303702221.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608281d53b0d9---65525202275.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/68066432860.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/nikiviritetubunisitasok.pdfIn PDF document text
    • http://strefa-fitness.pl//fckeditor/editor/filemanager/connectors/phpplikifile/lokepumur.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/wujozavafameve.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160990ccbdc028---femota.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/xuxukevixuzigima.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/kadumirukikolozalax.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/3cd49861302eb411de042e19367638d9/18671899481.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/f1dad0553222f415aedcf62e544d319d/sipujirezixujogoxepexe.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/73614252183.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/kodutavozomipi.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210629141925.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b55d10480fb---rozit.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/14171789139.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/ecbf0702c161af4e2ce66d9e8520222a/75792344225.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c986798162---71072193162.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/8b49fa1b2a0c1669ea76e5833689d3a5/gotiwedivugogepadil.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/8116b21d8d1e5c0ce32dfc577a7905cc/logob.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/aa01f9a19ba886fc049e5cca3de13ce7/sufabazagolulegogobipusi.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/gmor2gjk3h7l1pi3uqiu112617/37195846463.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/tbld66qhoc88lp58hftjuu30ul/rudobesukodurujaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=2012+cvo+for+salePDF link annotation
    • 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_off0000f186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF186 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001099d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099D 10300 bytes
SHA-256: 1ead7f4fab2b77bd6a38efdd6501e52d63bca15f717fc1488fe61abd161a5788
font_02_sfnt_off00012115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12115 17524 bytes
SHA-256: a28db4737d24c56993d038c1d8ee199ea613e93177ff992ee91fa28d4241a448

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