Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e5159036f5373e…

MALICIOUS

PDF

81.9 KB Created: 2021-09-06 06:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ad78ab46426fc0136308c5fcedc34c15 SHA-1: 6d2418231ce7dd10298661949c6f8cb0278f3a60 SHA-256: 62e5159036f5373e93787ed4c9dbf9938cdac9f9cd5a024f14b1f3faa4242498
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted from this sample, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea0e1e44a4---97396038912.pdf In PDF document text
    • http://location-venise.com/italie_documents/files/51173137813.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/fitad.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/bakojodu.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ninipok.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160a4160ee24d6---31797313111.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609471f46e509---dibopabebobikunamu.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/35497167696.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/7e20469af510eb62dd9f4479ddb56b66/16175225947.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/94871314069.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/37143372231.pdfIn PDF document text
    • https://voyageaventurenepal.com/upload/files/kerorugijejuvubexob.pdfIn PDF document text
    • https://hssanesteban.cl/files/fugomerimumowo.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/tomsmqn1qqdb3iks8a8a9m46ih/24428370119.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5f7330120---27431046662.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d70e02c72---tuxodakixu.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/99729319083.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/1cb159394553a21476fe0fb6563be2cc/63272480382.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/e7411faffcc23801931a8dfce73d33ba/pujobuxumitexawidobakus.pdfIn PDF document text
    • http://apsons.eu/files/file/girebowudiso.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b871b66d50f---fijixoxekupobalurixenula.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc3b39460c3---75979153965.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/d1i0uokqgrbq6umocl2gfvcqb1/poguledivatiz.pdfIn PDF document text
    • http://aliotoconsulting.com/clients/862286/File/85534629598.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=epl+full+fixtures+2018%2F19+pdfPDF link annotation
    • https://rt9.rspo.org/ckfinder/userfiles/files/74033705117.pdfIn PDF document text
    • 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_off0000d931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD931 18008 bytes
SHA-256: 7cff7e3cc6aab40406ca30b2e7820b3a8ce156a151461d1e1f47213fb93559e8
font_01_sfnt_off00010840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10840 10996 bytes
SHA-256: 327fe739620d8a32e094a3322e48eec133e1aaa66b36700d59c9415d2f56293e
font_02_sfnt_off00012214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12214 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1