Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6447645fe11417…

MALICIOUS

PDF

87.5 KB Created: 2021-07-18 14:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f0446da2581438a72da2c8aa741e27e6 SHA-1: ea8c176f3afd4f4c100485415c6d24554207719a SHA-256: 8b6447645fe11417189b319aab3a2e83e855c4b203d48779d79024478827b032
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm with numerous URLs hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. The presence of multiple external URIs and link farm heuristics points towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096206a99cb3---90304352065.pdf In PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160813577a7b26---99605822340.pdfIn PDF document text
    • http://chinalabware.es/d/files/sunasonabosexi.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/6a44babf381755ab3051e28b30380484/84105174711.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/d96c1d698f3e147dc3939d92aaee4555/jizojavam.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089936529e5f---vimusefupi.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/jdkb1528hva8tcopa24944aiq2/39083385788.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/3e220fe536deacba13a6295f84f02478/37072874842.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/s8uhfq9p9fuctuf4no8vqljcp2/49021110787.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/557466cc10e049757045352152804920/nosujinubopa.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/bt8n8g0tgqhejbs57c7pai5v1g/96051602427.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/94036643067.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/44902786303.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/4534d870aa5e1b86376257871b29c130/zonanixovuzaxizev.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/2c8fb7ecd3995f40f2d52ae0b7e8a29e/metemafixerixemile.pdfIn PDF document text
    • http://barcelonahotel.vn/UpLoadFile/file/xopowefojo.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811d9608e6c---77120174467.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/89693375895.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/revibefubewakoxegojikiv.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/82f21a871343b97a8c63419eccd51c3d/59396560774.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/65173914774.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081499c556eb---2931583798.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/995bf7ecd4520c55061222ce291f8ccb/wikovavatogola.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=foods+rich+in+omega+3+fatty+acidsPDF 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_off0000f2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E6 16924 bytes
SHA-256: ec14a8b33b5515ff60c2d3b9a26ef94ad84222f618e0bdb416f361d25c91f214
font_01_sfnt_off00011f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13729 11140 bytes
SHA-256: 0720e2778db3f0e1bc85ae04d06182fd28751c9122577e095c4004554fffdc23