Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad992593d1d8927…

MALICIOUS

PDF

80.2 KB Created: 2021-08-25 17:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a2f9d35165d80279665118b45e1bb126 SHA-1: cddd4cb94aa2b4f09bed1db15025284db75211f2 SHA-256: 8ad992593d1d8927e2ac9442ab31edbba601b5675f89510c413073dd4b5e49f3
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/f86s1lds6bc94ti3cjeunr2r75/solonedukumov.pdf In PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ca2b8ddfd---45294411570.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/12424254086.pdfIn PDF document text
    • http://71mhsreunion.com/clients/f/fd/fd19d29f3ef40f7e1d0269d1df38e7d4/File/desojud.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/36421402467.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/basovesek.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb3fb5d144---9298279214.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ed272e5cd---93450889238.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/fitaxiv.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///32441171459.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/muvegojirewibixifijo.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/wijilibo.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/81307563776.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210528171529.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/44dffda63fbbf6dbf3b0d9ae8aabe696/59765331259.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ee9aeb767---15808472317.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/fuvogenusagubelolax.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/10592390991.pdfIn PDF document text
    • https://humicdp.com/uploads/2021-06-24/images/files/pexibuwijetanoxexigamukam.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/99096834845.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608681c66831e---zegafope.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/mamejajuxosidotega.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/3140925266.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+save+url+as+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD769 16944 bytes
SHA-256: 147dc0b99f64f1a9e5c1f4739383e8bcfba0c9c87be5b316fb9f413ef877a63d
font_01_sfnt_off00010391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10391 10540 bytes
SHA-256: 1106d51499e684d7ea82c0b73302004bb62371cf2bb397d9af5b7a3b49654b61
font_02_sfnt_off00011bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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