Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d12fd39e267346…

MALICIOUS

PDF

74.1 KB Created: 2021-09-01 03:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1141d60c48a56deb984a1855e8dcf4bd SHA-1: 30d75ca0293089bb004437f7e08d6e8b3526bf08 SHA-256: e2d12fd39e26734643cc94a3cdcbe49e7b4fa1b1603e2f6a245d5dad083c11ef
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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
  • 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://eletroluz-al.com/_IMG/img_internas/file/92891290152.pdf In PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/cjdnmd1eq3g5v0ovkdgkdg6scj/sinetuleweluwu.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/71196899589.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a97f86a39fe---mebilirogenubajux.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070cafd92273---sewomaxikojifufemebanaj.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/8dabe811b54324c027f41de458855e56/votuzegenifup.pdfIn PDF document text
    • http://myphamhelios.vn/luutru/files/nawezonixafanipemisa.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/61236613060.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/41731139645.pdfIn PDF document text
    • https://autoparkalbanese.it/file/lozepiriduwifok.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/1361696150.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d27c238c8---64325771061.pdfIn PDF document text
    • http://lawngo.net/fckfiles/woninosilozokot.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/7d1593dba5c48f70e9d38c81b6ea14bc/farajidesegow.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdeac18d53---84705086168.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a152947e562---xexilukexegibemoka.pdfIn PDF document text
    • http://sentralperdana.com/file/26242854245.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4c51607a2---xebiruwetofibapizotip.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/voranixiv.pdfIn PDF document text
    • http://marymo.ru/uploads/files/22666124894.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/fezubanuna.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/uh4opb9unc5ik2pusqjl1pvatg/vebagi.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abc9ecdd0a9---mibutamelaxoperudi.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/16292096222.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076316c9b8d3---58271736978.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=if+i+eat+3000+calories+a+day+will+i+gain+weightPDF link annotation
    • 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_off0000bfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA0 11200 bytes
SHA-256: 7b4e72cc5e769906e318a8ac4a79fefbe5af06434cc9725c190c47e0826c3b98
font_01_sfnt_off0000d9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AC 15612 bytes
SHA-256: 04bfb7064bb3c15f9cff8062693651accdc9f1a86d103e289c3d9ca2c4e34a3d
font_02_sfnt_off00010169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10169 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1