Malicious PDF — malware analysis report

Static analysis result for SHA-256 05975285757b649f…

MALICIOUS

PDF

104.9 KB Created: 2021-06-28 02:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fbd61a0dbb63dd37d8d76aef2b68a7c6 SHA-1: c33baf55b4bdd2e3a947ab10e2cd2a2fc89cfcf9 SHA-256: 05975285757b649f5e7a8013f8038403fa88eedbefba7a29737b1f6644cb7cf1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to compromised WordPress sites. The ML classifier strongly indicates maliciousness. While no scripts were directly extracted, the structure and URL patterns suggest the PDF is designed to redirect users to potentially malicious content or download further stages, aligning with common phishing or SEO spam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/7c1093ea9fba5a9bf3fad4906a73a316/31495864019.pdf In PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/1448baa19689d93e2ed02b42481f502b/toguzedebikoxosi.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0185c45bc---divanizasa.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcbcf65844---zukukokarubigunukat.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/18417849078.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/zefoziletexaxi.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/k0v56htdc33njsafk42t8g5mr6/pabukodatasamexegu.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/48364566791.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/medurerisixetozabupon.pdfIn PDF document text
    • http://grabnerestriche.at/vofutubuwolofimudaw.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed52cc8202---38623411456.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cb80dfb06f6---vabivopedap.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d55ddaa310---81029149195.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/9fdb1829838a80c8266495bdb5a1b9be/97206895465.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608515564f1b2---gevonobugufitifejawuge.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0754aa9a7---24760994116.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857b573ee28---ninifike.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085c436524ee---39847248417.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/30570767621.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/oocl8acrs81vatat37di7j0k75/63980073820.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/52773534355.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210601210459.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/llqf5dpqhtcu22cj9hut9rku17/pagurugonelobu.pdfIn PDF document text
    • http://palami.by/images/file/sobilojubipudifexinusi.pdfIn PDF document text
    • http://rotarylaspalmas.orgdocumentos/file/kitimipisamujanes.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/torejasovese.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=wow+heart+of+azeroth+starting+questPDF 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_off00013874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13874 10832 bytes
SHA-256: 0219d1ace1f9e91d51af2498fdd68d9e0743d6e976213eb4fb0a4c1653110611
font_01_sfnt_off0001513c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1513C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001694e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1694E 17132 bytes
SHA-256: e1accd71611acc4433069b6f53bf97e1395f3e8d0b97667428399dae08368514

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