Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccff8e03202242ba…

MALICIOUS

PDF

71.2 KB Created: 2021-09-14 13:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b3e4c8df9cd77ce01a554331e972eed1 SHA-1: 76396dd1d44ac7b36a07cf44acd6b440915f80c2 SHA-256: ccff8e03202242bad506eb78ad02b60de9b43b251acb9453162f56573c0fe861
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document employs a link farm strategy, presenting numerous URLs that point to potentially compromised or disposable hosting services, aiming to trick users into downloading further malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/26192645566.pdf In PDF document text
    • http://shardamedicalstore.com/singhania/downloads/file/xizojakelubelanile.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/xatuba.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/xabawatifabikatofeg.pdfIn PDF document text
    • https://ski-valloire.com/ckfinder/userfiles/files/sekodifite.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/t112mqsmfsano58boqsllp2o7d/jazasixutiwa.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/wimugarazobiko.pdfIn PDF document text
    • http://dangkydoanhnghiep.org/hinhanh_fckeditor/file/73215651444.pdfIn PDF document text
    • http://aj-freight.com/ckfinder/userfiles/files/22773884267.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/25916328475.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16132dec918898---2593685225.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/woxarimutepiwovu.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/ziravo.pdfIn PDF document text
    • http://rimini-portal.de/bilderarchiv/file/gafam.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/6398580638.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/43900961336.pdfIn PDF document text
    • http://meta-min.com/files/57701399149.pdfIn PDF document text
    • http://zoscm.zohukum.com/ckfinder/userfiles/files/vonutujozewelupotam.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/58pid4hnsvdfpfei123dh17q6l/simisesudedabitoxobitil.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/66cd30dffeaae04e81684e54e9a7b7bf/lirisojepupekib.pdfIn PDF document text
    • http://hotnews.md/upload/userfiles/files/59338781057.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/64915686747.pdfIn PDF document text
    • https://campermagazine.tv/public/file/28959902910.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=pokemon+go+gps+hack+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000b6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE2 10848 bytes
SHA-256: fd8faecab02a130ef2d32ecb127cd9823fc87d06687799712e22090347d0238a
font_02_sfnt_off0000e79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79F 15396 bytes
SHA-256: cbb1691b216b8d3fbdf949f8becc06133779272c86e3a24d3768f5209b246e81

Open this report in the interactive analyzer, or submit your own file for analysis.