Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec709f2410c452bd…

MALICIOUS

PDF

64.0 KB Created: 2021-09-24 05:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9901f3c499f494957142a49285668240 SHA-1: 9bf22514e5248076e234408db5b1a1579b17a4bc SHA-256: ec709f2410c452bd488afe4a52b23a4b68757e1b24125c87a4e158b998bc6fbe
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs that point to various domains, many of which are associated with link farms and compromised CMS uploads. The ClamAV detection 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution intent. The presence of multiple external URIs and link farm heuristics indicates a deliberate effort to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4355

Heuristics 5

  • 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
  • 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://allytemp.ru/uplcv?utm_term=pradeep+physics+class+11+pdf PDF link annotation
    • http://ebslang.net/_UploadFile/Images/file/62209585662.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/77140190005.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/buzurox.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/41940146594.pdfIn PDF document text
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/wafobujarutu.pdfIn PDF document text
    • http://hangnhatbanonline.com/upload/files/gokogedew.pdfIn PDF document text
    • https://purefeeling8.com/data/file/90187741180.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/12056625230.pdfIn PDF document text
    • http://notar-frings.de/userfiles/file/manibupi.pdfIn PDF document text
    • https://kolkataangikar.org/ckfinder/userfiles/files/kupazaroxinulejirama.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/7112470399.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/borevaferaxugexudid.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/17944373018.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/dolakab.pdfIn PDF document text
    • http://mebco.ru/images/file/75727900833.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/sajogunawitajizazumefod.pdfIn PDF document text
    • http://entrackintl.com/uploads/18712564443.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/dcc9ea2f2f7bdd4ca931f1858dc2ef68/97189515059.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210904195913.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/79658683434.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/rexevijenibo.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/11972220737.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/2098678197.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cf8c2d68ff---50781114411.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/ebd0732560eb90b19d4fc3280bbdc324/36822015810.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56D 10564 bytes
SHA-256: c79d73c80f31a3534ffb59b43f331d46a2c70437ea6de0f88c7542ab8d4e3a09

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