Malicious PDF — malware analysis report

Static analysis result for SHA-256 07383ab9c5a460b8…

MALICIOUS

PDF

84.0 KB Created: 2021-09-04 07:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 676f797b47738649092ba953adf7559c SHA-1: 8509d6f5519e0eec9c3fc19d199426e23b1b76b0 SHA-256: 07383ab9c5a460b8f8578bd873303ad093b0363841c1f76ae60c37148ef51a23
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to various domains, including one identified as compromised WordPress upload storage. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery through redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://badrivishal.com/media/5629081102.pdf In PDF document text
    • http://df-2.de/images/daten/file/5644789064.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/33725856001.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/68226876973.pdfIn PDF document text
    • https://tekmaker.com/upload/files/58721453749.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/5b5e55c6b10b853c14b65220a401afaf/22745711436.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af60b483716---fefawapuvotukeposuvu.pdfIn PDF document text
    • http://edgecs.net/documents/resamisukiwa.pdfIn PDF document text
    • http://abpaluso.com/upload/file/jabogejutogakozu.pdfIn PDF document text
    • https://ladangmimpi2.com/contents//files/22531601312.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f89e64a5ad---95391401587.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de14bd66e70---moxagelilixalidudur.pdfIn PDF document text
    • https://rjpexport.com/files/katurirof.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/1985383622.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0532b156b---10526631223.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/091b1155adf15660ac1bb779aaca25df/xopupok.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/lofag.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/07b1a2472c30c297a7a9693ef4f794d5/ronodabalebowijolibede.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/fujuzeba.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/60570689099.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/14297811097.pdfIn PDF document text
    • http://hoangminhsaigon.vn/@dmin/js/ckfinder/userfiles/files/panuburov.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/79495898968.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=sports+and+players+list+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_off0000e0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C9 18916 bytes
SHA-256: 437dc4b011814ca5425c5bd1fcf30d73232289a65a92a1fe53c7a786b76a9542
font_01_sfnt_off0001121f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A36 10680 bytes
SHA-256: 65b3ab45778d3e209c5fb2aaaeaefdb42801124924fa67c5af5ace1720121a78