Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7039c5668307be…

MALICIOUS

PDF

85.3 KB Created: 2021-07-07 07:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6d130ed2400cd43948c3a8d638ba66cd SHA-1: bc82c6e2fcd74f99c704040722359c4a03f7e586 SHA-256: 3f7039c5668307bec6c896d80d0642df045483c271aa42456cc6b88a935c9b6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://oniceh.ru/uplcv?utm_term=william+beaumont+army+medical+center+jobs PDF link annotation
    • http://vencedor.coop/images/admin/file/38334041818.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/jelokibe.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d90dd1478---90036872536.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608f72fb018ce---22280825412.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16085a1845b926---55897065422.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16079bd378669b---bamugikemapanigiti.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/saruxakaz.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d17cc4c753---28731146396.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f478598c0---4625625204.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021063021212580554.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160881a2736386---wolidavanodizawowom.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021051012266_87978579.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/3591476655.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/77211042838.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/shh3fsg8eqqgfnvlb1m7r9t72e/lewabukul.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/sinogubimewuku.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/p8l4i7ojmde097kdnhso7hv641/43106671384.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/mifadanesipefinibiza.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/jojagupizelijagoriw.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/84851685902.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0098b010c5---xusisamuxegoz.pdfIn PDF document text
    • https://noddy.nu/images/file/guluruvuwegajekiza.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

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_off0000ea8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8E 11008 bytes
SHA-256: d35558d32346f9123349d781f56361ac5fa109fc8589e7fd9fc7f312f92f569c
font_01_sfnt_off00010419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 16796 bytes
SHA-256: 8c6f522d68673065f5835e5bbfc0678552d0c7b822512d3f80cc2b92ea7832fd
font_02_sfnt_off00012fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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