Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dddb39b2656f2a5…

MALICIOUS

PDF

70.5 KB Created: 2021-10-20 07:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2df02da89a8b9f8fce4a5efc6e8d3292 SHA-1: b7857871ec7352e96566ef54a82e291672846557 SHA-256: 1dddb39b2656f2a59fd6438a7468eec459ede95aa3d47f125aec0c087d4297b0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a heuristic identifying it as a link farm on disposable hosting. ClamAV detected it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7670

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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 http://tbff-bygg.se/img/files/wigunedesobezema.pdf In PDF document text
    • http://toonesk.com/upload/xifosito.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/45408519001.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/vizorumupigokaxagokadepu.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/manipovisuz.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/898703616968161486b.pdfIn PDF document text
    • http://adria-ex.com/images/blog/file/47965223792.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/xekawixodotanumowimozif.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/161496b72b0f61---17504286724.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/93113295044.pdfIn PDF document text
    • https://priscar.com/documents/files/tilav.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/gijabawiwegewewi.pdfIn PDF document text
    • http://soles2walk.cz/data/file/jadifavexuvepizawegibip.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/161481e4a6df1d---79490382607.pdfIn PDF document text
    • https://ziyang100.com/userfiles/file/art_16320015718189.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/72758765772.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/viwexutosawibobuf.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/36731617076.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/78745326148.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/wikum.pdfIn PDF document text
    • https://btegypt.com/file/pebopijavu.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/juwanojaleb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/23D8k0Ec_6w/uplcv?utm_term=what+is+assessment+in+ecdPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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