Malicious PDF — malware analysis report

Static analysis result for SHA-256 927bed23f3f7c74a…

MALICIOUS

PDF

77.8 KB Created: 2021-07-26 04:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c165c567e090b380c1fa992b597a20e1 SHA-1: 2061711e67cc39156548fba2e813bbc5595e00ad SHA-256: 927bed23f3f7c74a410ef5616638258afe8da9113b0a9cdf37bc4cb99c900240
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, directing users to various external PDF files hosted on potentially compromised websites. The ML classifier strongly indicated maliciousness, and the presence of numerous links to disposable or compromised hosting supports this assessment. While no scripts were directly extracted, the nature of the link farm suggests an attempt to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://hanmarklight.com/UploadFile/files/49585192945.pdf In PDF document text
    • http://eprdel.cz/userfiles/file/61418407479.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c18b0891a8f---mowejumeluxeka.pdfIn PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/94158945192.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/64568125611.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160da168ae7b00---pajatuzerilivizepiseri.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/zupupil.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/36a5d212e50be1088150e9df221f4c50/romiwolexidudaki.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/zejiposepedavej.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/54347982096.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d905e1ad4b---94882840962.pdfIn PDF document text
    • http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/paxikaviwupovesivisijefa.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/a4a9d0jiu2q8c28t7mpr3p1egl/7197252496.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/era8c0ohnc2q0k762maarb584h/36543808071.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/62d8fe6904a4a7bc9555004be5b2f930/83584906290.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071b173b3907---19704808503.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090a0d749891---16824883638.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/31339105786.pdfIn PDF document text
    • http://artospace.com/pics/file/26183388493.pdfIn PDF document text
    • http://clingac.com/d/files/sitatadodugopuluzume.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609786f56221f---rufibopa.pdfIn PDF document text
    • https://purefeeling8.com/data/file/xiguvozufinezetinubuf.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ad14d3bfc72fbf01022c8b2139cd9429/muvedipu.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/nofododumifinuk.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/90579899288.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=ramazan+yetgin+kpss+video+ders+notlar%C4%B1+pdfPDF 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_off0000c827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC827 18344 bytes
SHA-256: ff2558c506becf70dfea1b9c1516040a5c34cd061c6252f1543f2e7cb8228435
font_01_sfnt_off0000f462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF462 11264 bytes
SHA-256: 6a8daa643c23f512fa3ec268d70bac0959abe7d381c7114d371fa28067b186c2
font_02_sfnt_off00010ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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