Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb19aa13ff7e0e77…

MALICIOUS

PDF

84.4 KB Created: 2021-09-19 06:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dbf876b89d576fd63023638e9173a419 SHA-1: 3594d744d4ef82d9519e25cdbc0680f2f7e4bdae SHA-256: eb19aa13ff7e0e77a60896856a2840700a31e75afc62ffb59c71466c5c3ecd8e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. Heuristics indicate these links are used to host other PDFs or point to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://giritrademark.com/content_files/files/xuravog.pdf In PDF document text
    • https://gaadalagi.com/contents/files/jitaxasixorakomujuvoto.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffac27e98b---16660580386.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/6827950186.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613434b961bad---58201205788.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/ae22117db0dcff839fd8f895589bf7f3/gonolejijeganen.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/32035354785.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/79318711041.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/3416942629.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/degaxuva.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/53692463341.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/lutewutuxedasakuxofefuw.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/18694041121.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/5917003936.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/laniliwi.pdfIn PDF document text
    • http://vodnik48.ru/content/file/74921172555.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/wejegituluxuwudogo.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/vuwijufele.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/8h28e2osq2ohkju4peo3j37sp2/pasuzujodaromaveduk.pdfIn PDF document text
    • http://galenbio.com/images/upload/file/93072028049.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613489f0a1d3f---16761536728.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/7623262134.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/2107370194613f8c9416306.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/57663816544.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/40665578294.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/20219215295858.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=cite+apa+manual+7th+editionPDF 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_off0000e154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE154 19308 bytes
SHA-256: 1daaf3c67952f647050aa34bc698397c9948b7c4f80402d1ee1df2e5ab05b927
font_01_sfnt_off00011408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11408 10572 bytes
SHA-256: d6b9a8686db85a8e92a80d80e30fc049e116ddcaac689ba5dca2f38f7383d253
font_02_sfnt_off00012bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1