Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b008c06edf6656…

MALICIOUS

PDF

83.4 KB Created: 2021-09-07 06:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4916e670131816a22026c1ad135483ca SHA-1: 1d4398249cd0512ab8b01492886b1d1cca2166b4 SHA-256: 69b008c06edf6656e9bae5b299c5f341be4d5fe59be06df58b35f9b5b6e073f3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS upload storage or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/k2n00aecda4k2onbstr3ihu2r5/tibodugabe.pdf In PDF document text
    • http://www.binghan.my/userfiles/file/supatinux.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160962268db787---meloximaxuzi.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/luralirunupuxovotopesam.pdfIn PDF document text
    • https://flyingfish-stay.com/userfiles/file/sapepovimetavuliretelomar.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/07cde222508923eaca9923c292a6f4e5/visadako.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/82621185956.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160963a2343f64---40375234319.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/91979221587.pdfIn PDF document text
    • http://insureacompany.com/userfiles/file/sasunonowibew.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/6e5b21801de5eaf7ae5f1045b7b419b1/xeraturuvim.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/ponikafasotuzeri.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609788fb03b4c---jezalokevesedetomobi.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/b8f922d1f148dc1613ea844e01abbe83/40929592663.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/b377f000c67f1d3be8def7d93e7d2376/gavedonujoveromeri.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/otqj6l02j7mcqfm5qvn288jtma/87353135880.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/2uti9msq09k751k2manipgua2a/89581086276.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210617_CF0AF99000D017A3.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/getodowegixukujenitadakit.pdfIn PDF document text
    • http://seamacros.com/upload/file/26827713481.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a3e831e16---85048469136.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=manual+platelet+count+blood+filmPDF 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_off0000deb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB9 10744 bytes
SHA-256: 859d455d9e7d4c8bd9f764d256498e9f4a7d674785b79033d6c0296828291c59
font_01_sfnt_off0000f721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF721 18544 bytes
SHA-256: 08e81e0079798dd29f4dcbd47b7b521e133a9509e910e3278139e01e4df3abe2
font_02_sfnt_off000127d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1