Malicious PDF — malware analysis report

Static analysis result for SHA-256 59615d5974a1ee03…

MALICIOUS

PDF

71.8 KB Created: 2021-09-07 11:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d9b2328cb59ef9809ec4544df2f0654d SHA-1: 94fd0f392bd20dd1fc00438a99a9ab6db35a3b35 SHA-256: 59615d5974a1ee03786cf065fc3030da60d98df519e4df60ad4a050364af4661
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure indicate an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://egca.fr/userfiles/file/97764230756.pdf In PDF document text
    • http://xnucleus.com/members//member_images/files/31731073431.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbb2cca1a8---masotijeziwaxamumabupo.pdfIn PDF document text
    • http://meskerjager.nl/media/files/nizower.pdfIn PDF document text
    • https://membermimpi.com/contents/files/sifazigonebetevejuti.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95d50cbb58---45390712076.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/5024702431.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/28913914983.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/lokilanuralozenax.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/bavegusemosofilum.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607846239800d---23275372920.pdfIn PDF document text
    • http://kdekdyjak.cz/data/6712524178.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae041a5d38f---gaxebizuta.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/85f77e60fe27f19e5118c7ad1bb2b11e/49616530417.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/46360210073.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c960edb06---xoribefisozi.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e8ef71e4866---sekukoripulevupuvupuk.pdfIn PDF document text
    • https://x-software.cz/data/file/28769607258.pdfIn PDF document text
    • https://mfdesign.hu/files/file/lisivupenugu.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a10b2bf66---51484486894.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe5f17a07ef---nitumorobedujopijin.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/mudibiwofowowejavajur.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/rugomev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=sap+plm+module+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_off0000b88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB88C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A3 10272 bytes
SHA-256: e862520c24c1bf34ca215cae4ff81448fe27d5a5172b4f4a3327b8188bd7d3a2
font_02_sfnt_off0000e7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BF 16516 bytes
SHA-256: 6d6557a047a3c3c336ddae46bf4bce9b974c9be5e316143cf7d95375e427323d

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