Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe7bd58db063e3a…

MALICIOUS

PDF

79.4 KB Created: 2021-07-05 01:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 687fe65e555de89c7e2585e127ddb833 SHA-1: 63a2b442cb2bca5470764cec86e18d3190ac5428 SHA-256: afe7bd58db063e3a8423668bfc9500726ddb0ff818712416dcac1829f86b5474
96 Risk Score

Malware Insights

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

This PDF file was flagged by an ML classifier as malicious. It contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. The primary purpose seems to be directing users to these external URLs, potentially for further exploitation or phishing. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51a7a370be---40779787098.pdf In PDF document text
    • http://turexpert.md/userfiles/images/file/30326377503.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfaf4fa78a2---fabejiwe.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/06541670718fe930ad896b0b648b24f7/12332892228.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/27c0dd15278a9b991342ff8305ab2ab3/bolelapekel.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/6287214549.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/f7f67f41f380f7e2beb5ea405e7d91bd/rojagalizidatedenis.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070521c8f5e6---xeperosogidisexidoves.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080dad74ae8b---78437654736.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d0df78827---81420509950.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1a9e5d64---89110162875.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/7b2dvd4e911cpd2kv5p43r5pk3/57364813022.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b13bd8d09f6---5607975111.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b41d997e5ad---43518038591.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/1c059aca6dcac36dcd84c091c8e77e7b/23624186000.pdfIn PDF document text
    • http://ropesadventure.com/d/files/38144824567.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/89a3c1e11752d6d898222e5dd3046a7e/barulexamapuri.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609418a425d28---ruropuz.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd81d14c749---30378900435.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cb19e80b2---suzozatenizabafuvi.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608553b2ada68---lifurofonajonux.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/figanavuburokudufer.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6365de98a0---50940233350.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=implication+of+existentialism+in+educationPDF link annotation
    • http://irodori.kir.jp/files/file/gelokoton.pdfIn PDF document text
    • 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_off0000d322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD322 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB39 10836 bytes
SHA-256: 0614c0a2f6e710a366e190919c83dc9c249c1f471051506ee0ed9d088039a654
font_02_sfnt_off00010439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10439 16980 bytes
SHA-256: 7a00c405527b7f37f0bb383c957f80b6586bce30dfe7bbbff10274ef19ffc33f

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