Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da2e6b578201538…

MALICIOUS

PDF

151.3 KB Created: 2021-08-13 20:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7bf39cbf95b13a69f6c2a9471d084c9d SHA-1: 29561573b002feaf0a4df6fbb7594f797cc1fab4 SHA-256: 0da2e6b5782015387cbf571bd442dfdf4ee36eb8b8c4dc2ef3c74a8d9461a210
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm designed to redirect users. The presence of these links and the overall structure point towards a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9113

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083e8ce5cb2d---28731422479.pdf In PDF document text
    • https://sharenkon.com/files/11206305205.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/bimak.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/4b1dc81bd47a00c6905966ab44f47849/fuzetexulunatezijupa.pdfIn PDF document text
    • http://softtox.pl/new/userfiles/file/ropewulup.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afc458b09d0---70428598805.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1b479e678---79373361917.pdfIn PDF document text
    • http://yilip.net/userData/board/file/misikojuwitedawegifevaw.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/sejinojunomatalavelabi.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/b506887779478aa64da7272adbb7d2e6/bedaxavovigojudoso.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9d72944fb---78764672035.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/jaxadovekubebabobijal.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/67685845721.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/tegakunozotoliguw.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b093158958d---84389536900.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/0fe77871a06fd99ab5fcd9ac6e095a98/nalijotijo.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/65797069567.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078be4cc9bef---xatugevemejewubarefi.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/73722314825.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/notizenipovize.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/razoluvagidofosegigi.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bf344529d06---96291370800.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/tejakozagajenu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=what+is+the+order+of+the+magnus+chase+seriesPDF link annotation
    • 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_off0001f8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000210c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x210C6 18104 bytes
SHA-256: b5c693b69286f706d5a8ba2bf0aa986ae335d7d141d378ecc3ce849b8bd4706c
font_02_sfnt_off00023f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23F31 10972 bytes
SHA-256: 5d427767df884f5127b60886081df9d1462c9d9b4afb8c3ec13c23a19a795d87

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