Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd14879f7fd565c…

MALICIOUS

PDF

68.1 KB Created: 2021-06-07 00:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bc4793b1bc7728da8b432a9884ee592 SHA-1: 0a7c09eb26e496113093683acce26a358e8fbe9d SHA-256: 1fd14879f7fd565cf61ac2e08adcb6b2a13cf209276e740128390a2a217710c6
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations. The embedded URLs suggest a lure for downloading pirated content, which is a common tactic for distributing malware or conducting phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://pixomot.ru/uplcv?utm_term=interstellar+full+movie+in+hindi+download+720p+google+drive
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/0412388d6d57fcadca1940573f74b8d0/51871509944.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607198e22ecd0---38876825333.pdf
    • http://highlandlynxotic.com/clients/7/73/73cf6ae24f8ea70eb1cbac1dff6b0f9e/File/xarojuxi.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/n4aqkhln3ul7hcq0n08cv31oh0/wubipe.pdf
    • http://cjatkinson.com/userimages/fowuvijixepigova.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d49cca75b4---41176770926.pdf
    • http://refta-bg.com/userfiles/file/nuxezuloli.pdf
    • https://tenfci.org/userfiles/file/kosejagekogataner.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/9d9804266eeab2f37896912b648c8090/24081836578.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/rgtfohuvrqjpsdda0u5o5nbv8i/niberujekakur.pdf
    • http://szsahsh.com/uploads/files/7719503776.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/297064cbfbfa00a07673b74c4750b18a/59448865793.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/k0sgkn68dkiq3hh4mosgda5le4/75717451131.pdf
    • https://amitadevnani.com/userfiles/file/meligivopazuloxuxazomemu.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/df09301e910ecd8a155bb39a664e356a/bapaboserase.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d59e.bin
a6317faca42e3ac498977aa99b7d106ae55cad0307b3a0f2e0599da63d4e01bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD59E 5896 bytes
font_01_sfnt_off0000e9a6.bin
db2aa509d222a0de42032ba27b9e18d4b975946697b8ed3b182906ffbc481e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A6 10796 bytes

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