Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ce07d169f30743…

MALICIOUS

PDF

73.2 KB Created: 2021-09-02 05:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6a009e3f5400e136bea8437db78dfb0d SHA-1: fc46ae1e1e91f6edcf2827752d4b29356ef39804 SHA-256: 94ce07d169f30743eb14709f5672d9c1c862b74cee959474776f91a17e1d7400
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution attempt. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. The presence of embedded URLs and the nature of the links point towards an attempt to redirect users to malicious content, likely disguised as a student visa application form.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/8f7f0bbd3510beb53091e80f1db3ce8b/wosobamusekubufibosikinuz.pdf In PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/1ff7abcf5cdeca10be53e85e3652a445/xaredewo.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/bobejuruzolusovu.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c6232b1f6---41111675270.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/xuluruw.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/ghumuvnhf0mubu5ilc6hdojqi9/66389767423.pdfIn PDF document text
    • http://sun-eko.eu/files/file/letozus.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/67071544147.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/44723221181.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/d1d620bd0bca79bf3f0fe3a9d2428fcb/67784101162.pdfIn PDF document text
    • http://rudolphi.nu/userfiles/file/tipepefubonirim.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/49532356992.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/99566964976.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/bagaxitatuxekefurino.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dcc79278c---87545547857.pdfIn PDF document text
    • http://orem.mn/uploads/files/20414618132.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210625184639.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16076eb7d5bce7---metemadezupuwobug.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/kfsg86t8vttf5vc4efpe4n7f25/lebizufimeta.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608484ed4cf8f---7129053765.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/gerabasinuxipisuwazeroz.pdfIn PDF document text
    • http://lamorenj.com/userfiles/file/4508678782.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608786da763a6---jejivinos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=south+african+student+visa+application+form+pdfPDF 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_off0000bc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD477 11128 bytes
SHA-256: 24cb6b6000830d4ccac7a063046c2b32038a6fe2940f63c8e35c581fec2fd80c
font_02_sfnt_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 15768 bytes
SHA-256: ca4cb5737f36b96b8f0211481c91c49072ea080bd20c98ba3bcaaf01b272f7b3

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