Malicious PDF — malware analysis report

Static analysis result for SHA-256 125eb3d7e29eabb7…

MALICIOUS

PDF

70.5 KB Created: 2021-09-20 20:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ec254d79ce1d2b9da2d09c7bb6550989 SHA-1: 33670988f6b34fedde9f1153021372a3a161e6bc SHA-256: 125eb3d7e29eabb731caa474887f751b3ff5f7b34c377ae2a63b8ccb9769964f
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and embedded links align with techniques used to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=subway+surfers+hack+unlimited+keys PDF link annotation
    • http://antonellascarpittadesigner.it/userfiles/files/41836369400.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/bidolaxiveledupubavo.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/banetiwixebisovanuji.pdfIn PDF document text
    • http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/176987356.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136aaf3c512e---kokataferiwunisanejafo.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c69214fbdd---volukivalis.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/59247729733.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0588e857d---39045218900.pdfIn PDF document text
    • https://mfdesign.hu/files/file/25339119978.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/80129399528.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16131f2b126c36---zazodujitufuwokofovop.pdfIn PDF document text
    • http://ranfeng.com/userfiles/file/2021-9///20219171245554444.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16143cdcdcefd6---revowemudagox.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/wukowevesigel.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/52541919414.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/79876567763.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7f6b81f88---gamiluxegametosulil.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16146185af3762---bejuf.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/76692122836.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d299603ad5---40825802172.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/79409393041.pdfIn PDF document text
    • 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_off0000b224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB224 15804 bytes
SHA-256: e79116e395efd27657521fd305f0db96b81aa02e67f6ee4c0a994baa598b3cb3
font_01_sfnt_off0000da79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA79 11228 bytes
SHA-256: bc1a000a3d9b62f59c770e3f35ef0f7344dda4b0c5ec63dd2cf07cc26be60b95
font_02_sfnt_off0000f4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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