Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de19e9ec3485137…

MALICIOUS

PDF

84.9 KB Created: 2021-06-26 05:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ef7a22e0803b5c15d83916777bc10c9b SHA-1: 21dcead19249ab27f08ab1c268b061f32868ed90 SHA-256: 6de19e9ec3485137979b418316fce386e83e5cd4b7ed1d17ac4afb7f62e9c1dc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. The file contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of numerous URLs, many hosted on compromised WordPress sites, indicates a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://slaterlighting.com/wp-content/plugins/super-forms/uploads/php/files/887f37a2e6165ef4ee4a4a83df67623c/teregukotesaj.pdf In PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928da5da5d3---26460193221.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609463f26f6bb---34559027430.pdfIn PDF document text
    • http://iltorg.ru/upload/file/66642506182.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/27e70cb7e7b8febd869bfce9cafe7fe5/16751431676.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/mapukesetuj.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160763d22114a0---mafoxumulugoretogamoj.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/9932501c3f55118a17eef8e9e369da06/ripodelemi.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/72161713600.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/vigakozakepo.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/86072610927.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/jolufolifadoseba.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16095aaac1658a---vovabusalekudibozegirixu.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/kujupen.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b044cb0a297---vofajezafawazi.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/janonezimudukiwuzuku.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c3928612f---saguxote.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/pdm4lhoqj4g9pbjqc93g7v51os/wusup.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/45226370410.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160850337a4db3---kuzuvoguxawomuferuxozel.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/46599336926.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/8fcfa0f2bc408e00daa1970065ee2d14/zonimeti.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/zodudefudagufoxutitemiz.pdfIn PDF document text
    • http://weymouthhighschoolclassof62.com/clients/5/50/50fe23896e84432c97ff20d680692bb9/File/netuxizesazureti.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081a06572a06---zoxewojebawaxatofofaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=it+support+servicesPDF 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_off0000eb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10395 16928 bytes
SHA-256: 52b6b6fd91ba9e644744dd4b751c8c2afd2eaf9b8ca25c262bf764b28982ae29
font_02_sfnt_off00012fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC6 10172 bytes
SHA-256: 538764ac084f7e8fc1993b22bc5c67d933d8581b0c9bbc3b9eafcb9bfa2f9156