Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a6350557410401…

MALICIOUS

PDF

73.4 KB Created: 2021-09-03 21:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e065d59a31d645c8e43ca1530f13c0e5 SHA-1: 97e184517737e60c905fcfdc3bfe93176fb0a259 SHA-256: 67a6350557410401bbf3a318ee9679605095939ab1439f48fc58fa57266ccfa1
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malicious files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may also instruct users to open password-protected archives, a common tactic to bypass security gateways. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=morrison+y+boyd+quimica+organica+pdf+descargar PDF link annotation
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/c93e1bdb1ded89c08821b020ba594e28/fizobugagukizuw.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/fs7n740osg34o97qu8tqs350he/81065873820.pdfIn PDF document text
    • https://beaszemin.com/files/45086133083.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/gonitolisuvonosewa.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/25561420442.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dc5279713---32576858137.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856cc68df68---pesoreruwuz.pdfIn PDF document text
    • http://korea-labels.com/ckfinder/userfiles/files/jajesisexagijedaded.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/59466290692.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b9eeb2581---93520190475.pdfIn PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/zoxivinetizigexizoxakun.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/1940226617.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/94n6rchpqnc52oguv2m9mmlgd3/94812354539.pdfIn PDF document text
    • http://myphamnanyno.com/luutru/files/50831878155.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/7356346920.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/61434426815.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/kexuwedubuxukigirono.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/43731628240.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/murabekidozenawudisif.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/60421771496.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/3914099039.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_off0000b93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB93E 11312 bytes
SHA-256: e4fad122a7724ef8eb25df3f32ad47c5a304f1a2f6fe452c6b0201266d8f8d77
font_01_sfnt_off0000d321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD321 17384 bytes
SHA-256: 35fec577830eee7ee201eeb0d00f16c5db708f6486d4d18845b0513c59a23659
font_02_sfnt_off00010026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10026 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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