Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb961c47a61320ba…

MALICIOUS

PDF

82.2 KB Created: 2021-09-09 12:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: fb7c343b69e164b1320401c412756191 SHA-1: 220129f1cbe0425e61c9cf8085698650ae85ef51 SHA-256: eb961c47a61320ba99329b4584777e873156f62edc0dfa05244ceee09452debb
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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://curewelldiabetes.com/userfiles/file/nusugalelaxedejo.pdf In PDF document text
    • https://accu-split.com/userfiles/files/28119014834.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/83174916172.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/28136886107.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/21900400325.pdfIn PDF document text
    • http://thaide.org/userfiles/file/kabopanukoziregigixonap.pdfIn PDF document text
    • http://temple.mo/userfiles/file/xebagepozuzuv.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/31110275503.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/7067953496.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7fdbb19b1---93127626650.pdfIn PDF document text
    • https://ascii.tn/web/cgi/file/4044784193.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/0hdev2cl8thfo8r4vhl0rfvc4b/68971147867.pdfIn PDF document text
    • http://bridgeonlaw.com/filespath/files/20210904220249.pdfIn PDF document text
    • https://ksi-system.pl/editorfiles/file/87257192521.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/nomitud.pdfIn PDF document text
    • http://nktrading.qa/file/files/kenitikosow.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/7627501544.pdfIn PDF document text
    • http://lerucherdesanges.fr/userfiles/file/37878657882.pdfIn PDF document text
    • http://lmtechsolution.com/userfiles/30857306397.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/lakoxazanutegivotisukuziv.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/59618286857.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/71963568930.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=add+custom+ringtone+to+androidPDF 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_off0000dea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA2 17244 bytes
SHA-256: 3a95e0dadbd66b5bc8930a0774eac6c559f4ba662cf1dc92ed99d3b42b28d5bd
font_01_sfnt_off00010b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12350 10748 bytes
SHA-256: b6c79b130fc2685ded395a2b5098f895931dca122311e6ce3207702d2df78ed0

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