Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e19d627e1a9665…

MALICIOUS

PDF

96.8 KB Created: 2021-08-12 02:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 0dd97a78e01087ec85b92ec33ff09675 SHA-1: de9f43e144447e329c164b22ecd937ce58ad72a1 SHA-256: 11e19d627e1a9665cb61c812d1e0b3c7cee2d5846abd4f130c0ee04d7d93327d
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and does not provide direct clues, but the heuristic firings and URL analysis confirm the link farm and compromised host characteristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b168635041b---564907494.pdf In PDF document text
    • https://luxm.pl/userfiles/file/10230826754.pdfIn PDF document text
    • https://kis-u.com/page_data/file/20210607160146.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/7bec3e3abd0c5c8a5d336c52a6b93f7e/kudawobisejon.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/28732389345.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/nisolugusex.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/lplib171vd9jimduv2pbqsorlg/22906773107.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/99074456820.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/54556007212.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/7aac34f11691ce279eca8a96e6d10450/dazagijovozute.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/juputiwugidigazokowewoxas.pdfIn PDF document text
    • https://tempatpasang.com/contents//files/koketilejufukepanive.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed6346fd3d---zojuxogumupedefudamadetej.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/2352744747.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/davekudepug.pdfIn PDF document text
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/degelufugivaku.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/82283064445.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e67c7cf60---93574792740.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a40374c4ebb---3910919491.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/35560898190.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d91ccd276e1---60726957215.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26c46644c9.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/77aukr0u2gpa4ol08fpfmjer5q/99831709780.pdfIn PDF document text
    • http://thaide.org/userfiles/file/13319335436.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=h.d.+young+and+r.a.+freedman+university+physics+pearson+14th+editionPDF 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_off0001106d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12884 11488 bytes
SHA-256: 6328ecd748f88b6d85429c9ab4d0e67721b12e73f5f6ab1ca006afe5e84c70ef
font_02_sfnt_off00014367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14367 18592 bytes
SHA-256: 4bf17d9b49d32fe05ae6e4c8791bf3350ee7db448c9d814ea6f89f5438525a74

Open this report in the interactive analyzer, or submit your own file for analysis.