Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96af27cf7ddd7ae…

MALICIOUS

PDF

66.5 KB Created: 2021-09-01 17:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a21daaf8a45cc0653f5d6f2463e85476 SHA-1: a56e6969d6aa7aa8f42e9a8f7678c2837c9cb8a3 SHA-256: f96af27cf7ddd7ae0271bc32e6156e998303b2a3272fb7a6e6fa05fdb751f22e
154 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6909

Heuristics 5

  • 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
  • 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://alexsrmenchion.com/clients/b/bf/bf5401b25fe3457642f5a6f1150d5537/File/tofiwumovupalirizobawu.pdf In PDF document text
    • http://chokmanee.com/userfiles/file/74328282649.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/3d7e8208bebee4d03f959a1d7ad2e986/dapojimiz.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16226259271146149608.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/p2jjgvfirq218agg56koaej8l9/11191790503.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610307299ca65---84539697112.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/ronokopesatomotejoza.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/3n598jf98njc9ojmv3tmmstaqn/18595724624.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608401e820d25---48940480355.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/30ca10e314488c8c1608e81d0c1fb699/6424152503.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/20d22639fee216b689d8edcc12715d4c/1205948127.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/73736909851.pdfIn PDF document text
    • http://okulsanmalatya.com/imgup/file/nuraxiwodasazaluvulufot.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/delupozi.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/bilotofajo.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/13741297929.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160912ffee96a5---tamavimotajabagavidiloko.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/fcb7b151c7f774012e7fd20256954752/rigofogotivuterokudetevo.pdfIn PDF document text
    • https://brickbodysupplements.com/newerac2c/userfiles/file/9874446470.pdfIn PDF document text
    • http://sheilahancock.net/blogfck/file/dudipi.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/jobowogosituwek.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/4992b86982a5dd23f65b6e4ed346677c/16357735778.pdfIn PDF document text
    • http://accronline.com/userfiles/file/26801524097.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/tuwirerafojowirobeni.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/89818282687.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/d0f5719a703c015dd624f32c1a6b2bf3/betekuzebesozusozuxo.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/73407278518.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=vygotsky+theory+on+outdoor+playPDF 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_off0000cc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC61 10856 bytes
SHA-256: e047ebb9138b918368e12c1fd76dbb722574ca0d6843e34b720f4062c42a2492
font_01_sfnt_off0000e53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53B 15968 bytes
SHA-256: 5bd00b0b00fd32fdde0671659e82a71a8f640c2f9686937ef89c29cb0210f55f