Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddd61283bd59267…

MALICIOUS

PDF

82.0 KB Created: 2021-06-26 14:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ce786113277c4e51928f372527e6d2e7 SHA-1: 16b10b01860861958f6ccd7a7d5778768a58dbac SHA-256: 2ddd61283bd5926742fe5e610b7f73706efa8f64f72f095e690d01b546abfa01
154 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The ML classifier also flagged this PDF with a high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7981

Heuristics 5

  • 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
  • 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://qtjdb.com/UploadFile/2021/06/05/file/20210605_160546_183.pdf In PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/326f7f384881bb205adf90d5de9acdc0/16161646982.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/711f576aa7b53cdca26433baca6021bd/situlosamijoraxomiloleza.pdfIn PDF document text
    • http://hhsbluebirds1967.com/clients/b/b5/b592d679e9980e62d9d56be1bfb8b6b6/File/41753085327.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c11f578d14c---13456145981.pdfIn PDF document text
    • https://hgb.se/filer/file/74704463291.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea78e0c28d---kivizegijifetitugiteza.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/095fstve8cppss4307mk5tbp50/44420430582.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f4e9246f5---wovus.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/gexowulepo.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/bf0p11uoi57k1rt9jnkuqfrd7a/70208048132.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/zugugofunetomadexixora.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b474b19ec---valil.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f65a2a4a7---53858003554.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/wavuzuxibebepelikamad.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/bedodululu.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/89n4q7k2rnuv7idvgl2kepg9el/wibiramodibisuzibito.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/71b1919bc724cd36fed1b87207ddae2c/zokuwisavoguvubobuziginer.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f4ad7ac6f---20099487369.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/1ap4ohfer515o8onul2v3jmjb1/77786548622.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/09c84c7581d5a262f813ab385ff5a7a4/54008890393.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/sedejidokofodex.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/tumoviz.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/2tvp0b6u2d3v6irpubfe7dopcj/xerexogivabejelo.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/52dd85cc76b8ebc18a89121b2dccb38d/64467184074.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084d3324be70---8278338027.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ac70cacd4---9137305344.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=c%23+getter+examplePDF 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_off0000f702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF702 9104 bytes
SHA-256: fe4a9ad32d6d12da45ce8861a1e6e511df5579fd33367a5c4d1c9e774d301804
font_01_sfnt_off000109d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E4 16932 bytes
SHA-256: 9a00ee28c1b6dd4b656de9bb4cf1c28e6d20648cb5aa6ead0aeaff525ef6353d

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