Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5fd88ee5ffaf1c…

MALICIOUS

PDF

62.5 KB Created: 2021-08-28 05:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 6e9df9f3aba4fae69e1a46ee99255745 SHA-1: 33387e72b7d3237153db9aab361e5f81e3211f54 SHA-256: bd5fd88ee5ffaf1c30e8712a870314fdce950711577ce72d9d17750acad7fec8
124 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content. ClamAV detected this file as a phishing trojan, reinforcing the malicious intent. The embedded links are likely used to lure victims into downloading further malware or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4315

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://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/lg4tfsmb97f2c8kpob5437pt80/27961562745.pdf In PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/orkapqn3phinaq3tuhe0u4o8i1/93879052377.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/7024920627.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/54864522956.pdfIn PDF document text
    • https://educhina.mn/editor/files/guwumewitukokijugumotes.pdfIn PDF document text
    • https://latgalesamatnieki.lv/files/file/jenezuzosazerawesekoni.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/813651021.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/ramenujelupinut.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/44420343885.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/07a09de62b40c3f176efbdd9808c90cf/tiderifovulesurizad.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2794f6372a---85467859738.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/93659216881.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/9992b30c5af52ee4cf8c864c5984becf/jopaboda.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/72286552840.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/qfdlfk5ap3vk4pc2o14b537b25/15649682672.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/161084621db632---37366982195.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f64aa80f26---89607615008.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160dee1ab41432---zuzopevixezufok.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/51489181002.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021081915293742.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/kobetixibalozuvewitul.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/92138849627.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210824230811_bik9pk.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/6crf87s02mte0135i3g2jve415/kitenilunawagapudedupuros.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4545ca4e1---dixexigamurudojevolad.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/33708072543.pdfIn PDF document text
    • http://aqcons.vn/upload/files/puzironif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=richard+pryor+funny+quotesPDF 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_off0000bbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCA 11076 bytes
SHA-256: bd82af75c8d8b34049686423822eb8f6f6c0e46d783f90b2f323cdf38c538f06
font_01_sfnt_off0000d572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD572 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1