Malicious PDF — malware analysis report

Static analysis result for SHA-256 039cdf2c3906c7e3…

MALICIOUS

PDF

88.7 KB Created: 2021-07-14 01:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 08de76919a56d7b2fa271dcb60162ce7 SHA-1: c48f302bbdbc41567d76757b88d722d350a72daf SHA-256: 039cdf2c3906c7e3de967e07500ed549d1e94058453fa429bdd594b0f9a7c3e7
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to compromised WordPress sites and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and link farm heuristics suggests the primary goal is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba6533adbd---30840830815.pdf In PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/4a801bf0984c2e1b2292ec87bf085413/46479429951.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/walejale.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef772920fd---86363367820.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ab977237b---88889194586.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/ba8c0c710f8074832f402cc9d343ff57/93287850543.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/98758740977.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/19311572053.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e0e21133e---wifuxerujalemomewirapi.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607231da5500f---98044222981.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/givulinijuwobefojideruk.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/8716663130.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/zeviba.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/83902914545.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/1079191162.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/dbbrt33gkjbo75r9p0od5m30qq/selugowipogapekaxadu.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/gqrbmm7vpvp96f54c4t6d65vkm/74002846169.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a8da21208---wixamefupun.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/eu2f7qtv6vmflo2brsei78mmq5/83747752245.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/30ff1920a74717f0c4e6a27d82b1ff4f/nafubanapiwa.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/575b85da75d5070cdca1d89b980cc9de.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/e6ode5g4vshsagtuf422ed9ci5/75718282967.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/c1a53b47d507862875cb910ff8ece23b/wugikivapupelipusuto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=percentage+sums+for+class+8PDF 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_off0000f248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF248 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5F 10896 bytes
SHA-256: b4fe569b27ea352a6e78cfc5fb55686b6749db9b593a449df4afbffd8688e693
font_02_sfnt_off000123a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A7 18256 bytes
SHA-256: 5a5af36d2f435b74de2c1f6d029ac7875321944aa61ca89090516b03a0c51323

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