Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9fc14101ae125c6…

MALICIOUS

PDF

89.1 KB Created: 2021-07-03 03:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 720957202264027245fb9812a84e937f SHA-1: ba0260a0cb7675c53ab5dd0f0bf0efb88ff084ff SHA-256: a9fc14101ae125c685504ad80ab76b7ffec90d772a8cd6a296029c397b0f8463
96 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites utilizing the Formcraft plugin for file uploads. The ML classifier strongly indicated maliciousness, and the link farm structure suggests an attempt to redirect users to potentially harmful content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • 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://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a337c3ebbbd---mixanataloxubipaganed.pdf In PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3775f17ef0---30083458331.pdfIn PDF document text
    • http://lakehighlandsrw.org/clients/863582/File/57817583435.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd4c68b9d2---lodaxoraxisuwav.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210504041040.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713253e49a8---17196437641.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/nebl67cv3nc3likq919of6jdgi/gosopiliv.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/ctofg7ch4nnm4m8opk1bkeltu6/28508191099.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/61197920503.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/fdkk4u44r2j45189oso67037ut/bisenudomenamituzopuguvat.pdfIn PDF document text
    • http://apvn.info/userfiles/file/48900166687.pdfIn PDF document text
    • http://stpatricksreunion.org/clients/84553/File/tukedowawiluguj.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/4939f0b464027d13a3b659c092474f7a/2154143339.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a846aa5717---disamag.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/jalawinopujak.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d66d707fdd2---poziz.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/17b9b7dd16140e28cabf0b10e035592e/jesepukegaradu.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/lijozunar.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/59991958776.pdfIn PDF document text
    • http://luatsutiengtrung.com/app/webroot/uploads/files/66039685732.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/3nea2c6utk5tel3fgk0jaqp8kv/55744014123.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/40534639315.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/dafumavupipululewusuku.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900c78bf66d---bavotunuto.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c898ed2ae2---zajovuma.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=stata+histogram+by+groupPDF 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_off0000f80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001101c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101C 17560 bytes
SHA-256: ce7e060c508e265db432b1fb14b3281ee1e92e9abf1fe2efb59fb3bdc48fea32
font_02_sfnt_off00013e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6D 10848 bytes
SHA-256: facf54074a378e505deff165d58273bae6c132b9355c9112f1d2d0c93d97faa4

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