Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef248fac9a1068f9…

MALICIOUS

PDF

71.5 KB Created: 2021-06-24 12:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7047c15853e5870f0ac508f35f6922e3 SHA-1: ec2d419c2d2b5b60274676984a3c3ff757c4b121 SHA-256: ef248fac9a1068f90c7d0601a6200f2bff0e74a6ce504d60970a1a8f536b2166
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to compromised websites, many of which are hosted on WordPress installations using vulnerable plugins for file uploads. The document body, though heavily obfuscated, contains text related to 'Pes 2019 pc game download', suggesting a lure to trick users into downloading malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://philabc.ru/uplcv?utm_term=pes+2019+pc+game+download PDF link annotation
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/1q39lgetvlbmam3ivhtshu6ltm/58494845330.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/14970072114.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607181d8ae76c---63028627470.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/negozalexuzaga.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/ks3hm7d81hj7pbbi7667pp58b0/56618984470.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bf31347d605---gulifafimidekenaloga.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/bobebenesajepotirugun.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d9fcd02d1---wurijil.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210618201428.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160886df7294e6---gomelawopubufejujujajewom.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/qbun9pd5t1j9b1mp9k6hovicr5/92084460095.pdfIn PDF document text
    • http://soupworld.de/upload/file/zevagiwavatupexazijuf.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/rumozarede.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/8e3673ff27e5b30a708761bb6936423f/mudutomezabuxofawumip.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081dd6c0efc6---89606682368.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086751ee0405---giwejuben.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/91226409758.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096e8429587e---wuwapedobasoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD855 5872 bytes
SHA-256: 7269f768385cb2cfb7570213b16c172cb48d7ab9913ff29673a881eef4f53012
font_01_sfnt_off0000ec59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC59 10920 bytes
SHA-256: 916623120bf8674095e0aa2f44c34cf0f26e0d27656f08684519103038393d18