Malicious PDF — malware analysis report

Static analysis result for SHA-256 5027eba6c98e8ea9…

MALICIOUS

PDF

91.9 KB Created: 2021-07-05 17:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 17a0ea0e5f57576d477e7743d7429f6a SHA-1: 7bd963c1f760bf0d1a2a80adf690fee97fc37057 SHA-256: 5027eba6c98e8ea904662f9b4cf0a2081228f09865ff4dcc8e3a339b6298a5e8
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to compromised WordPress sites, indicating a link farm designed to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8e5c3d59d---gazutafuvufo.pdf In PDF document text
    • http://bafiti.com/sklep/userfiles/file/pexudejafivafusitofu.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921a549112e---bonapatub.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a304bd8cc27---nedokumufos.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/877e709ac1b8b901220f334cc5ab2e8b/rakasurojexuxowiguwopifo.pdfIn PDF document text
    • https://activepymes.com/pub/file/2358275506.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/483d3e7a70a6ef9821952c4a94a2807a/jemexavevefa.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/mokagame.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a57f8761ca5---tugiwugisiz.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5adcccefde---29738814951.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/2df347a70de8815f2a3ffd7526079c40/nesal.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16091aceb901cc---25748190419.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b50cd35e7d---70758605718.pdfIn PDF document text
    • http://hyderabadibiryanicorner.com/admin/images/file/10628683958.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aceafd25366---22250006113.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/jovanem.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/98172155936.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b8f72dbbb---riwore.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/c97ed2604ee40ff83e39eafb6c74eb0b/wararuze.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/iftqpqflebveil0jurcdjs504s/nodejaronerudezujobo.pdfIn PDF document text
    • http://www.polni.si/Images/files/75850188655.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0c2a45acb---maxugufujavufesebegopitu.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/minolinufuleginedonagom.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c30f61a4e3---jodemadudimukiga.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5ac9d1ded---67085044511.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/zikuduj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+make+him+chase+after+youPDF 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_off0001015e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015E 18368 bytes
SHA-256: 8bf5dfea691e6d38e4a37f0df5a5a826df5ccd91375104f5e0bdee1ddfe73a53
font_01_sfnt_off000130dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000148f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F4 10836 bytes
SHA-256: d87e9b284ddd4a544eb3fa07027b1aa9a2290a7a0c63abe2565d0b25e3dc2451