Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e396239cabff54…

MALICIOUS

PDF

92.9 KB Created: 2021-08-02 16:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3fede4c20bce8f864f0b2441344c4a07 SHA-1: 7c9f2fc3210323815cbb33325374fe7edc7b80dc SHA-256: 00e396239cabff545810e08aaa3108f0ed01a351fc2433be97e5543ff37fe96a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malicious content delivery attempt. The document functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely to redirect users to malicious sites. The presence of external URIs and link farm heuristics strongly suggests an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://drafthe.ru/uplcv?utm_term=what+is+contrastive+analysis+in+applied+linguistics PDF link annotation
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bca67daf695---xanubefakajawilogimozesog.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/4a0dc0c8d1037db85e807cbc6354b03d/dajenovogipuvafujasaw.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d31f5abca77---59283655826.pdfIn PDF document text
    • http://music-saikung.com/ckfinder/userfiles/files/zadob.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/23496798258.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/60814654813.pdfIn PDF document text
    • http://redsky.tv/userfiles/files/migibodozuxedaleji.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2852a8d931---firevu.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4b4cb63e53---fowipiwagig.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/78cccceb2d7477dd2a1458f1f85105d3/84846358293.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/83216643767.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe83543549f---texefoxazafo.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/30863690339.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/71f6irfs8i0psh61usg3f3q0jh/3880505194.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad306a03a0---81769845676.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/liwulogijivofeposazovo.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/26144324265.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/84984219300.pdfIn PDF document text
    • http://xpressup.com/userfiles/file/34959542772.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5d5454b07---zubuvalidunejifi.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/26407177304.pdfIn PDF document text
    • http://coffee33.ru/archive/file/46829133241.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/m7niiglm37ongcnu71kghpof47/48296423038.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/barox.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/69075663554.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_off0001054f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054F 17748 bytes
SHA-256: 48648b782c8282eaae2a7b52b12ca075055d33d2dc15e965b2d8a2c8bdcda8ca
font_01_sfnt_off00013324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13324 11068 bytes
SHA-256: 2073f09352c1e6983350d1734b4a3a6df7a7271d0c9777aeaf31754f7544b56f
font_02_sfnt_off00014cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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