Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2ecefe5b3acf0a…

MALICIOUS

PDF

101.5 KB Created: 2021-06-30 00:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7d37bd99e87f46f078a77bc0cd09bb32 SHA-1: 2fa5270b19c36a4cebe12d388262bfeb2248c0cd SHA-256: 0c2ecefe5b3acf0a6f2b3f075033e99665233793aa7d582ada36a0526a68f3ea
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, so the analysis relies on the URL heuristics and ClamAV signature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2938

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 http://dongfangguohua.com/ckfinder/userfiles/files/linute.pdf In PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba8436fd1c---nebodoxaxoj.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/2aa5a787c266a007782e28a8381541cc/jesinofuzugesak.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0257c9075a---migamexibeda.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/fasuzudominobavenamizo.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2faa3d2f2c---pulijorola.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/63904211614.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607757d564178---59754708003.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8ed830520---tisoxofilewevikutoso.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/77123473113.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897cbc99759---papate.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd4f8f3c6f---54337588218.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/nhnco70lbtc0l3g8tqmetmpfh0/43998436207.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/119d8f4bf0ecfbecd8ba771439cb6711/moxarafasupidem.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/efb55d39ebbbba5a3e25007d196ec3cc/88329821003.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/tumedidon.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5abf27469---bodotubefulumivanetegun.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/f9769a270f1282f7aa34e0d481760ec8/busuguzoxibozo.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/3a341dbcce0a389a2fc424fdc8672716/46295609697.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1c6862fc9---jefadafilenubiwuziwuf.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56335d29ff---vijixevak.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/kuvakulewekizokeruborek.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092995072eb3---35940486076.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/1579ae60e8bc257ad3cdb80d16e6c5b4/kafomazataju.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/30bfcbb81ac83db088044c188926e80d/zuwazejonuwemefur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=very+little+nightmares+apk+visionPDF link annotation
    • 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_off0001497c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1497C 19216 bytes
SHA-256: fa7942ed7651147cb2f3d6669d5a015154826c4ecffa8424f180d269a2e8033f
font_01_sfnt_off00017cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CF7 10940 bytes
SHA-256: e506b1880fae077cc87930549ca627251add37b3e72e8318b5da8a50fab13bdb

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