Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccbe0cb806c1776a…

MALICIOUS

PDF

77.0 KB Created: 2021-09-07 03:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3f7b14f0223eca96b4335735328b36eb SHA-1: 571216d95af4cc03f18b02ee384af2b9c83a983e SHA-256: ccbe0cb806c1776a2ebe1a110495239ffe9bc068c157318d4c4f9ed3162d66fa
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The ClamAV detection and heuristic firings indicate this is a phishing or malware distribution attempt. Although no scripts were directly extracted, the structure suggests it's designed to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3768

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 https://istanbulbalbir.com/upload/ckfinder/files/33617380216.pdf In PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd79b0f9e9---39879271323.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/zafarobip.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/tnpnlee03rh4csot6lc3s1eivc/38332748269.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/ninatozemokiwe.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/wexisilugokupusunelo.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecd63c10fa---wusidajulurekiwiviluxapi.pdfIn PDF document text
    • http://cuahuyhoang.com/media/ftp/file/tisap.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b86bd755e0f---30392905257.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/eruimse3kui64ngrqq4n67u6v7/tepogafeninisegagogosomif.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/pesojimema.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160b611f562510---walevupagolalivep.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/kewonuxa.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/52523178391.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/b5674314db22bb5c5331e79f28dbc190/fupevugaxuxu.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd52b8d53f5---dagesatoxot.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071cc150db80---nupitusixav.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/o6m35n67981itvk425l2nc034u/9646471324.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/fkme44ph6rmg4fcigb5rtk4969/29619415319.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/kokidozimapedofuvabesoseg.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/kexokiduzusomuker.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/50060137068.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/85030739263.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/81461490627.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=national+gallery+of+art+map+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD466 19544 bytes
SHA-256: bb8a97767f7f4208bc40c7a6bef82306d7d13823f3e05aaf057cae1e88635020
font_01_sfnt_off000106e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFD 10764 bytes
SHA-256: 05bc1876a54469da693546d26a02d6ad7cfeaf00919e8c776436bb20c20cc97b