Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea335fe2e7e4be0…

MALICIOUS

PDF

90.6 KB Created: 2021-07-27 08:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 07d9634577085069680132de82dfbb2a SHA-1: e54f7ab9d8bce1a35896267d2d0683f1e3dcc0ab SHA-256: eea335fe2e7e4be05176a3d053feb9694581f7e48c9037d45b3f105d25506e2c
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics identified the PDF as a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The embedded URLs, particularly those hosted on compromised WordPress installations, are the primary indicators of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b259c483340---tidakekitojebazagode.pdf In PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/icdrmr24t80tenmr489ptqb5n3/64222219771.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b4af3e08a---65368481764.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/58842315514.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/t4rp1e12q135g6onm4o4gh5j84/99449785723.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a930e8305---jejajoja.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0550a5ebef---timaniwugolopu.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/26807135561.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160981ff1f1d00---66406325218.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce44f4d5a7---93331257462.pdfIn PDF document text
    • http://bethtikvahevents.ca/clients/2/20/20a91c0cb94b02964b0d1c5d980f1596/File/3940569411.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af44cb3cd3---jifijok.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/f2ki9vl9ssmo8qbhmmnm9rb485/7029804896.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/61849281839.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/lapajepijokep.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/0f183a813d1db95348dcb3ac88acf24e/5495341716.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/58533226787.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a140a646520---vabomomatijonamupoxad.pdfIn PDF document text
    • https://nadamasristorante.it/file/35546934396.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a6a772554---jazejiwidujoj.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/modupurememawofu.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/lafikalimosowexanagajukiw.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cafd6f7a51a---37724428140.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/rozixafoxebidonag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=petit+livre+en+anglais+pour+d%C3%A9butant+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_off0000f942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF942 11136 bytes
SHA-256: 2e6ceeafe26cdb473f84ed34b50a34c3120878157abbe2e6944a9d1a952b5c6b
font_01_sfnt_off000112aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AA 18668 bytes
SHA-256: de082fc42d5d2952ded65c21c55c32b8ce28e3becdaf03fff8d584addc244036
font_02_sfnt_off00014108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14108 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1