Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b74c311aff860fa…

MALICIOUS

PDF

101.3 KB Created: 2021-08-03 08:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2438dcc935cf6eb360ea87dcf1532d98 SHA-1: 1fb96c72b733d4e790eba55a3553d6db5959bd2b SHA-256: 9b74c311aff860fabfb343ce765fbe32f423647d26f14435d649b01ccabca405
124 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm or phishing lure. ClamAV detected this file as Pdf.Phishing.Trojan, further supporting a malicious intent. The document body is heavily obfuscated and unreadable, preventing a deeper analysis of its specific content.

Machine Learning

  • Nyx PDF Classifier clean score 0.2074

Heuristics 5

  • 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
  • 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://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/ac185318b4ae0dc1f15405d4b150d214/80317049716.pdf In PDF document text
    • https://zold-kommando.hu/files/vuwujumemokuf.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/bea44a43511181822bfc752483d7ce2d/bimodinajigo.pdfIn PDF document text
    • http://wirheiraten.de/images/file/44446421480.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d8ed85a43---relefadugujobelosimomat.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/tevebinujuwifinuzaf.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/3871945d12ac3f6c12fb23e21b90d12d/ziwasal.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/52729549423.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/i1h4phsd68mpsh18g22d45j520/3410664340.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc18f5a470---dawumevusom.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/7966215381.pdfIn PDF document text
    • https://btegypt.comfile/lebujixozowep.pdfIn PDF document text
    • http://planbmedia.hufiles/bovewumun.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/006ae74d519f08ea8d512792a861d63d/53221047765.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c961a0f3988---rumababuribu.pdfIn PDF document text
    • http://unsersohn.ch/images/file/baxexebisuju.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160c773f8a3205---funufonagax.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/49465536151.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/sabosulebosavubisad.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe3bec93a4---kesojeguxibagab.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/4eb32e7d55cb3664a1149aa5da5f2aae/kopudenixelopo.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/17582838386.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aba9e2ebc5---64250281224.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/mijojonaxono.pdfIn PDF document text
    • http://goopenapp.com/uploads/files/pesawadodojuwivise.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=dev+i+love+you+bengali+movie+castPDF 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_off0001442a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1442A 18264 bytes
SHA-256: d77794c35ec49e361fb3ee2f364624392150e4fe195f0445e8034053ec01f24e
font_01_sfnt_off00017480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17480 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1