Malicious PDF — malware analysis report

Static analysis result for SHA-256 feaa9f3001bcccfc…

MALICIOUS

PDF

73.9 KB Created: 2021-09-04 10:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 746fce0f3ad7d30b3367b984ba131515 SHA-1: a0bdd8c5df900d25dbe9ff7f063c95a95db517ac SHA-256: feaa9f3001bcccfc21e4ed50d57b4670e59d9d4d9091c4b79cb161bf66cd5682
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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 http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54101079951.pdf In PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/73221069663.pdfIn PDF document text
    • http://togul.org/sites/default/files/file/fupotujepipewolabe.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/2p49g4sggd3j0gksdg5n4t4rdc/24936075895.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/11036084954.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/96731080171.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ec6f4e19c0---godifiruvujefarijoz.pdfIn PDF document text
    • http://poorclarescork.ie/images/94791906011.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/32946097457.pdfIn PDF document text
    • http://diodelumi.com/ckfinder/userfiles/files/gefofagikexujiwuxike.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/lemeguximizuwovamokag.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16084dad1d2e62---mokowemidagu.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/ladagidenufi.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/65075472389.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/21132485014.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b54a936cddf---miwomube.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f32e00b3654---3787175521.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/6jhsap2c8f8gce39gplr9qral2/lawawosubibuva.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cec23be3f---73831571848.pdfIn PDF document text
    • http://321eastern-thailand.com/userfiles/files/23293957692.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/cd17bb694b72682eeb38040d2d489c10/38637258352.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608149c86ac72---labepofeperolaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=faroese+an+overview+and+reference+grammar+pdfPDF 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_off0000bd02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD514 16896 bytes
SHA-256: 793f25e6a8e8b13b9a329dba776b37476af1a5d10b2eaa9281a7eb0458916eb1
font_02_sfnt_off00010076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10076 10948 bytes
SHA-256: 4f85f5a7575c4db32d0224553f3c6395a0cbf5d656720d6231f183cdb4dcc9a0

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