Malicious PDF — malware analysis report

Static analysis result for SHA-256 614d6763b086f84a…

MALICIOUS

PDF

80.2 KB Created: 2021-09-15 23:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 27bff1afa3ca13a42a4f533b5339f196 SHA-1: b8ca5aee4cade1ee454d6d31362f425e398897d3 SHA-256: 614d6763b086f84a7c6829ec31200d3da5cd8de1f6422ce099870a7a92be0a9f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised websites or disposable hosting, suggesting it's part of a link farm designed to distribute malware or phish for credentials. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • 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 http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee241d1718---sumokisasazunum.pdf In PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/30405447441.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/nifawaboniditanekunajijad.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/6135ce5e0020d.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/minonodawipujo.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/80173991111.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/xugujati.pdfIn PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/bilazavar.pdfIn PDF document text
    • http://marymo.ru/uploads/files/nugogulu.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132810e32b29---kanesifexajan.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613108159a14d---voxov.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/9term21ohthpn8j5s71mt14mf0/bagenevijologivuropagale.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/78952201163.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/10179725676.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/57553505591.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/0f8515701ca1d1a559a6aa7e2b7743a5/19340855291.pdfIn PDF document text
    • https://architektor.ru/uploads/file/69568685860.pdfIn PDF document text
    • http://tanabuauto.com/js/upload/files/likunirigomoweti.pdfIn PDF document text
    • https://happyjourney.webtrails.in/ckfinder/userfiles/files/magokimurofib.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/gumavasitamumo.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/21297161190.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/39919020508.pdfIn PDF document text
    • https://sydneystudytour.com/accounting/userfiles/file/dugenasipu.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/suvateladuvidegowosab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=reasons+to+stay+alive+matt+haig+pdf+free+downloadPDF link annotation
    • 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_off0000d286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD286 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 17688 bytes
SHA-256: 2c2f1cdbcc6f41487dd4d1b2d3c58b969e3e0b6d50e750093313a37e3fcdc185
font_02_sfnt_off0001185b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185B 11256 bytes
SHA-256: 6b33e82138721f21a0fa4e7fb3a8a4bcdd192608f906473f7f8bb9d8387e7fa3

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