Malicious PDF — malware analysis report

Static analysis result for SHA-256 432683bd125ad401…

MALICIOUS

PDF

70.3 KB Created: 2021-09-06 12:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 141a83400bc6871f685955cb53fed0ec SHA-1: 2b90c87ed3d0b1f7e96350c5718ee84ada710c01 SHA-256: 432683bd125ad401c343210f12c15255d0b6484a27454fdd8f2dc14e32c327c3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm or phishing attempt. ClamAV detected this file as Pdf.Phishing.Trojan, further supporting its malicious nature. While no scripts were explicitly extracted, the structure and heuristic firings suggest an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2573

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://rockghs1965.com/clients/8/8c/8c68d0bbb6adb8fad5f76254a0516489/File/gupokakixozelutide.pdf In PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc02cebf906---66626119171.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/fkqi332lepf0fhvp9334m7ji87/bosurubadabagegedomaki.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/73004218777.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/pebaxigi.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/nugajirawin.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/bebibuji.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/e4a72a067e712905e6bbf943456237d3/mozemaka.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/12548188020.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/wutorixagivugovoz.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/5tsl077gno6lfql511bab52qtg/57138613150.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16084ad964adec---22708468618.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/518081f94067b2e6428b9d4cf5cfac93/99836920379.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b44925b72---letopuzidem.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/46613777866.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/laah3qpoddhhcd6cksj205e4pk/10077563840.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/zisupixomu.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/91471385954.pdfIn PDF document text
    • http://primeasset.hu/fileok/file/razodivegemilu.pdfIn PDF document text
    • http://edgecs.net/documents/papobezajazanixojaluler.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/40100847767.pdfIn PDF document text
    • https://media-get.com/userfiles/files/nekifozepo.pdfIn PDF document text
    • http://starinviter.com/ckimagefiles/80314759756.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611d576c79144---wodemurepibirof.pdfIn PDF document text
    • https://saglamahsapkutu.com/img/editor/image/file/wekav.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/lomupatuvagetamoruvun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=kidneys+anatomy+and+physiology+pdfPDF 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_off0000d629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD629 16240 bytes
SHA-256: e0f20a2d62558a6817653002e17abb4dd1c680f4842f5a39488aaad6666e8488
font_01_sfnt_off0000ff9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9E 10952 bytes
SHA-256: 20dde3db05e58eda4d21ee0a21fc6b8e7e3a1d542cf50ca6468641d01f7e1cd1