Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60e2543b7a4868c…

MALICIOUS

PDF

87.8 KB Created: 2021-08-07 12:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 787a93ffaa37fd3bfcd3bdfea0095cc3 SHA-1: c54da5ebb073418fa65adfe3ecf0ca8137a032ba SHA-256: f60e2543b7a4868c9bc47c491393feee3a34bd4bda0793d9d98edf7966fb50a4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a lure to execute commands via the clipboard, suggesting an attempt to download and run a secondary payload. Multiple heuristics indicate the document is part of a link farm hosted on compromised or disposable domains, aiming to obscure the ultimate destination. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 http://neoneophytou.com/ckfinder/userfiles/files/26383817594.pdf In PDF document text
    • http://murielbellhomes.com/userfiles/files/ladukonoxubunarifusulu.pdfIn PDF document text
    • http://geose.ru/userfiles/file/gukokaboxugifawedu.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/11984037790.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0135ef9f8---pobisakewesozokimep.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/11603409607.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0584628a4---dikafebogupesosunefibi.pdfIn PDF document text
    • https://ebooksweb.net/files/file/48561676122.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/vagejozolelevik.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609db99f840e0---91000025098.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/wufalivosibajugalex.pdfIn PDF document text
    • http://deltastal.ru/userfiles/file/24733626290.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/zojururowojumoxanikazezif.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/c1d475031974a362e41ea4479a1df643/74353722338.pdfIn PDF document text
    • http://ecole.ru/text/images/file/24437032060.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fbba7e060---goxaruvowoxomof.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0f4726955---lajazuwumexenonuwim.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/rizowolapoparikif.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5117bead14---situtofijowukevaj.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/1cbacc2874288dfd00a03f806e061053/femisesunafuweruwajat.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083cf646073d---gekizijoxipiwamuvuvop.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608accd1d8206---1019508712.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=lg+g4+android+nougat+updatePDF 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_off0000e61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61A 28912 bytes
SHA-256: 3690b8bfe8678fda5864d581deb52e80cf499099ba334608f537706a01525c00
font_01_sfnt_off00012239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12239 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A50 10488 bytes
SHA-256: 0c80fe4e8367ebd808c22218a481bb8eca72ef76e64a87412a2ab2ac4d470022

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