Malicious PDF — malware analysis report

Static analysis result for SHA-256 3025aa16f29f8777…

MALICIOUS

PDF

84.3 KB Created: 2021-09-19 02:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 703a01f9d7551be91f5cd995cb80d0fd SHA-1: 16a107dc8bbc276e34ef6e1503ec043d9c41bbf5 SHA-256: 3025aa16f29f8777ddc5394888d982ff443c6a045cde7b974307453740a5c475
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://wroclawmodelshow.pl/ckfinder/userfiles/files/5206720624.pdf In PDF document text
    • https://network-italia.com/file/69660287294.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/lafibivenanivaza.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/pubogafudetubu.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/kukudovixulawobojoru.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161395f86303a6---52500181425.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/morifemupovike.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/88483329221.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/e9da42af3b31ca6c7cddbe01e400e570/90422305046.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28776750094.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/ab95237c8e2082b2b9e9e8dee45786dd/gijobapa.pdfIn PDF document text
    • http://kag.fr/userfiles/file/nutukefirimiwevi.pdfIn PDF document text
    • http://kbcsisa.com/upload/fckeditor/file/dubuzororo.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/zumizozatinileda.pdfIn PDF document text
    • http://0985028898.kad.tw/kads/ckfinder/userfiles/files/rukobawuzoriravirimadiw.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/33298393156777d12ef1d0847ce9690b/zijexazagonika.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/76940196132.pdfIn PDF document text
    • http://tyextractor.com/d/files/pebinefar.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/fevuwikefoxategasosoxakev.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/tikije.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/dusoguxojibi.pdfIn PDF document text
    • http://dsacare.com/admin/uploads/file/58487257652.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/zigido.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/20788576695.pdfIn PDF document text
    • http://gurolmumcu.com/userfiles/file/bizudinivuzexi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=watch+the+legend+of+tarzan+online+freePDF 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_off0000e3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FE 18168 bytes
SHA-256: c0dcb5e6f87d7a1c49b6d1b8b811758728224ad0e5c01b11b64d97dd81a239cb
font_01_sfnt_off000112ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FF 10640 bytes
SHA-256: 4489b8f5c6288b7f860e08411ed455ebed5baf100cfffe2410f299075351b76a
font_02_sfnt_off00012b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1