Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06216afd7e699ee…

MALICIOUS

PDF

89.2 KB Created: 2021-09-10 18:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: eb784b5991896da8917ccfcedaa745b1 SHA-1: 449a1e46e76a42a9b655446db46f762b22245ee7 SHA-256: e06216afd7e699ee93b2af8edc9f5311dd188c4086c1531bbf3d86b199a6a41e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery through these links. The document body is heavily obfuscated and unreadable, providing no direct user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=text+decoration+copy+and+paste PDF link annotation
    • http://bienbao.org/uploads/files/91614915731.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/mopagedup.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/dalasabatowasetulok.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/lidom.pdfIn PDF document text
    • http://www.luna1956.com/images/library/File/jeninusakovolefelutig.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/medekaxavelonik.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc335cc14e---kuxoge.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/g8k4pfg47qvjd8odqmvijuablm/kitofanibi.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/vujidaw.pdfIn PDF document text
    • https://sim2007.com/files/95950245858.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/xageniveporibawoxovexox.pdfIn PDF document text
    • https://bocrangsuthammy.vn/upload/files/90192116142.pdfIn PDF document text
    • http://teplospectr.ru/images/files/33969260176.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/1fcbec645c7d2794602271bfaf62e260/woxumufulawa.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/37238469378.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/javefuma.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/20162278504.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/28243700433.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/33583756000.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/34000239136.pdfIn PDF document text
    • http://ty6600.com/userfiles/file/53382816474.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/worexerokizevepazamux.pdfIn PDF document text
    • http://restavratorstvo.com/ckfinder/userfiles/files/mifupuvegekiz.pdfIn PDF document text
    • http://eastwoodfamily.net/userimages/vijufugegunarirug.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC743 1868 bytes
SHA-256: b44e304f4199d162c520aa61e4565b27969aa952fa2ee1db3f4cf671ae1a9eb8
font_01_sfnt_off0000cff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF6 24988 bytes
SHA-256: 7fb0bc8b0f1948c3e1810c69b0b97f53fc1142b51083dfd30edfa7ae2e12a7b2
font_02_sfnt_off00010ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC6 10640 bytes
SHA-256: 5f4e5a07d25c30e7098fa0bc2f0d08ca98a34e7a4ca568dd45b47f6a79a5c50e
font_03_sfnt_off0001274f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00013f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F60 16396 bytes
SHA-256: fe170ae82735658a3e1890d241c17d74304e740431117b662866397a06a8c521

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