Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e80aa97fd3fb072…

MALICIOUS

PDF

85.7 KB Created: 2021-07-08 03:38:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cb9d8a7ff1ea44b87416240bce0552c7 SHA-1: 6464f84a41200559073ad4d4fd0e27a117117945 SHA-256: 3e80aa97fd3fb07276502b821b837de1b6c3d3ee6f62e58d7fa53b506a47b019
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://topupdana.com/contents//files/saruwapovuno.pdf In PDF document text
    • https://lapiadinafelice.it/file/42419376864.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16087a63e8860b---32068683772.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/ffdcef59b4b6adfd711764fe59cfd1d2/bekujutigipe.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bc8b62bf3---46929974653.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/54480958412.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/wanazimakalesitusotusewaf.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/sekesowub.pdfIn PDF document text
    • http://vnplastic.net/upload/files/gesewune.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/56393248288.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/44453754425.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/zevusuxorilikavamol.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/c59d4a6f4d1a8481c5ff4cb7b18aa993/mozixojujakefejopa.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6fd41c04a---tijosanenerodare.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bcabb22e423---farivazaporusegerozox.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/49220832d0f602fb8638ad66f2115c87/65746171898.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/pepaginugisowejuvob.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/13t1dnhjvkml5kf3nreo9302d3/vevajexonufux.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/35557070139.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/wovigunuwi.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087df1163f1b---rezatax.pdfIn PDF document text
    • http://citysuji.com/ckfinder/userfiles/files/84335800171.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/77399849517.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2af8e5d68a---gipopatatifenukadufu.pdfIn PDF document text
    • http://isgsrl.it/images/file/jebunewozuzeliforod.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/xizitudutegatixe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=tax+deductions+for+charity+2020PDF 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_off0000ebb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB8 16924 bytes
SHA-256: d9368f8bca0a0c3184788d5ba4dfae129724944bafaf3d3cb1ffaf77193998a5
font_01_sfnt_off000117a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A5 11048 bytes
SHA-256: 690b678c599cd29b8b229f7a9e2a95af9616676a4e5e26960605d19f5c891a1c
font_02_sfnt_off00013168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13168 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1