Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e70c39e48f755e2…

MALICIOUS

PDF

101.0 KB Created: 2021-06-14 11:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f573ba2c057d760888b833c8b2fe1749 SHA-1: 35615b53e5e109675a9b9c1cc6a81905f393a21e SHA-256: 6e70c39e48f755e20656b58bad1ee31a8a223a5e6367e2057d47ffe4a9fd6ddc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://chcial.ru/uplcv?utm_term=download+drakor+boys+before+flower PDF link annotation
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/bb70be5bcf89d7a03edc44f6a2cc2e0d/64734548876.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d32fa789f7---xakanakemeg.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc05d2a57b---pejebiseveraginonu.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6238403ae2---bujitaponinoxugase.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/ad53a5qg24huhepihon6vco3c1/bawitefe.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b458ef5abbc---91252319967.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af00d223c09---mafuzuriwawute.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/35df5159e9c37bfb51be21f8c0bf2bee/95504957865.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/40137674373.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/1fa58363fe8e76b4f3e83fc5a4bf5a19/63020488658.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b76c3b67c8f---lasaxezebijaduleki.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3d52b8170---tirowenexu.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/72486512829.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/62843480122.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/dagaxekarij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5D 6012 bytes
SHA-256: cf3cc8767b061aafc0c5c191e60f2a34951f7e9f75b217e8663001d9c4900abe
font_01_sfnt_off00012466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12466 4960 bytes
SHA-256: c212ee98fa99721ab997218d52f75cbac4dabe256cce7f4b1f994197f6443983
font_02_sfnt_off00013566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13566 14184 bytes
SHA-256: 46d39bd23e9d3d117faacd8a394acd3e7f9801a2747955bbf333fc17f8e3a4c1
font_03_sfnt_off0001617b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1617B 16036 bytes
SHA-256: bc1c1644e30597ae0beaac312b9749a82b64e26c109397326cdc67fdbaf2fe17
font_04_sfnt_off000175e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175E2 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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