Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe10ee195d4325b8…

MALICIOUS

PDF

81.8 KB Created: 2021-07-02 13:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4c03071f71b2c76084f3e0e4a93478c5 SHA-1: f741bd4fbf93b192c34c2aed1532f1e7ad264a0d SHA-256: fe10ee195d4325b873e33f013bfd8285a7820526a59d386f951fa20f7e514435
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous external websites, many hosted on compromised CMS platforms. The ClamAV detection and the nature of the URLs suggest this file is used for phishing or distributing further malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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 https://ka-base.no/images_content/file/60071226645.pdf In PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/e8489shd8b1fqe26h1henl25mm/rizowogewakawuxatoloj.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbba02d46a---6885802183.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad995ee0981---gurasifukilapa.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/saxuk.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f0fed4004---jaxufa.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/27444292940.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210613162542062.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608956c3b22e4---37297593353.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/75aae1a63233e9ec1b1ca199df371712/44255283891.pdfIn PDF document text
    • http://lungtransplantopen.com/clients/d/de/de7cc03d42bda6b8b84c8ac9728529bb/File/porakuvuxu.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/d5ce97a13b133e29d7a0188e417dfd75/ririwo.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/40651069683.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/cf91effb9637976fb4b195cca0639297/vonag.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/95579527240.pdfIn PDF document text
    • http://ozari-ua.com/files/file/98438530095.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/vfjo7osq7qdd9n2jamtb148apo/73332935466.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/32n60h6hkta8aip3ca4htg368v/numowezefodotovamene.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/dabopefamavaba.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/98d5d52807e7cf39e3d278f213866ed1/wefusevimigonegijupavenig.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/6222a56bb5677a8ecdb154c0ada4d182/towuwodekirovowiwi.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/d24a2398f9665021b188e1bc83892ca1/jixivimujerabusisel.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e79cf88c96---87368743072.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/36539978867.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9223b83cb1---16592575524.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=given+the+figure+below+find+the+values+of+x+and+zPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 18352 bytes
SHA-256: 56a41ccf8a100a84104e87202d498fa05fd219106d12673547d941ca0427df10
font_01_sfnt_off00011a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A55 11228 bytes
SHA-256: a19a124d3a493071e0a22d6700d62dc2c26917beaf67a9c3b763f2cf91c72e4c