Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6382704141c982a…

MALICIOUS

PDF

74.9 KB Created: 2021-09-01 06:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7288d08e8a19ef0cb56f5654241e652f SHA-1: 23539dc8ab05dce18c1c52eeeac60c8e14405c9c SHA-256: e6382704141c982a22f847c1dfa7af48afffcc5df53fc8ab41645b3c63e1d223
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://crysiq.ru/uplcv?utm_term=jay+z+blueprint+2+download PDF link annotation
    • https://davaocarrental.com/images/file/pemepowegujujutazesem.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/xilagikefexuxozige.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/safobofelavijodopu.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/domeguroro.pdfIn PDF document text
    • http://vipacademy.org/userfiles/file/33259646845.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fakuxadotusirudilivowogul.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e339b951f0---vijetepopokositofeb.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4cf36f9cf---18919612329.pdfIn PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/90253372427.pdfIn PDF document text
    • https://melz-feu.ru/upload/tekiwe.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/raposulubuduzopuzuxoxo.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/fujatolowitapada.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610369e20c617---pavipomajenipiwafutanina.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/1566ffb8928c2522464c2431f7d4afae/jefuzijepiwekexowekago.pdfIn PDF document text
    • http://gamboeng.com/assets/ckfinder/userfiles/files/12612518651.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160b232615cf65---nanonavejuvogexofebexedel.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/270fc6qg6r17qfeempivae4r06/32849068731.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021052122250058.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/76843ff8ddb21ec4888a34885ce47352/vojajijibe.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/fdd8dc4b08ee7862c542b154af4a93d6/boleluparu.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/tebumuxapofojadaki.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/14374192329.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/k42felno9pdkdjtm6su4l5mgb1/49405450770.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FF 16620 bytes
SHA-256: f44bed1feae26d7b549648fe3264c3aa29da44908aa15f51b7e7b376eaaa59a5
font_02_sfnt_off00010443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10443 10828 bytes
SHA-256: 5fe3ba90695f3272a61f3f264bf06ebfc4a1adeaccb38e60f35b85b37384eb1e