Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d2b6bff852cdf9…

MALICIOUS

PDF

100.8 KB Created: 2021-07-05 09:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 3731b18e46b235c29a89f9e1e21d55eb SHA-1: 8b016991fc0d5866158da17bc5059e997dbcf43d SHA-256: 10d2b6bff852cdf9393a48d213a225093273954c309edde65b6f9dc3a8923e80
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9899

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://pixomot.ru/uplcv?utm_term=conversion+a+radianes PDF link annotation
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/20e02c2bfabb466b263800b3ecda923b/bilede.pdfIn PDF document text
    • https://go2germany.ru/files/file/kunefetumetomufu.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/xenijiluvuridixopo.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/05c03656e1862bfa7419ed2fc57638e2/kamexuxumulitadovugutajup.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/xagixoluwuzuzodopezakuji.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad9cd07843---guxuzojogebize.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/71881298550.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ct7avdk2anmnb70bilft3pggnm/zijugunapudirelotebusurak.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a496194eec1---99840757605.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/e90ggf5uvb89p7tpofd1bmda0f/43296837523.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bd89e57a9---gisok.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab251c4f0c---49211573002.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa7471dbd9---jonaxawol.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/muwoxurizisijukod.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/cc3c575ed8e86dec11e5334e29741ba9/baxaburakusele.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c7974d5c8b8---zaxaziwap.pdfIn PDF document text
    • https://shibbirs.com/media/files/13250337680.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a728776b41---rilegakogol.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607946e2d1280---30261123963.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/f095db61a5f8b36102cab15dacd9121d/5419698920.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/ad687dbc1463cfee31d621c1d4bd9f0a/rugokep.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/lokamokirozodexusuxaxuv.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/wotaxomavisobumokep.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12381 20160 bytes
SHA-256: ca4c5c7d71c8e46a18013459e357db347dbefb286f41a5f658b4743b14907699
font_02_sfnt_off0001580c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1580C 16084 bytes
SHA-256: 325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7
font_03_sfnt_off00016d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D39 10196 bytes
SHA-256: 5397c7ce6d5c70075c3a18574e4ff56f0fa8984dbc5a1c86da8d341303619c38

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