Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca46b2e2cc37fac…

MALICIOUS

PDF

94.3 KB Created: 2021-09-23 00:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 024560256a5ae54fb769fcc149b79252 SHA-1: 97ada245b1705ad92fe5a262816c32ff50812f4f SHA-256: 2ca46b2e2cc37facd0cf7486906fef3c27dd85a21580083b5b2062f27821dc12
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://puzynowska-kancelaria.com/userfiles/file/32816115989.pdf In PDF document text
    • http://rafaelokazakov.com/file/kulijo.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613260dbc682b---vuvefol.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/totepu.pdfIn PDF document text
    • http://nhac.ditimchanly.org/Images_upload/files/gurimisavavinova.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hmdumpsi5k6pkp9epoqms1jmf7/somese.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/75547851477.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/020258263338.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/62742425346.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/fukusimukiwetopifovijexi.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/64046100493.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/94919796631.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/67189312791.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/39714353205.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/jafavowifuzotupafex.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee0e922d35---siwafepaxaxavojedep.pdfIn PDF document text
    • http://www.mab-solutions.fr/upload/file/mogawojunizavugovisomude.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/39377426571.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/2f5ef2a1a6cb7da963d942b2cf8854b1/jakepesobavogakarot.pdfIn PDF document text
    • http://jadeite.ru/images/file/20227201432.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/larumujipitu.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/roboxevaf.pdfIn PDF document text
    • https://goodline.by/userfiles/file/30412097533.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/nukaxeworimasude.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/1364389789.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=demon+slayer+movie+watch+fullPDF 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_off0001078f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA1 19252 bytes
SHA-256: d0fede49c5a9ff3f7b52dd136ac6d98df035f284506c7ebbd8956da5ddf63829
font_02_sfnt_off000151e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151E9 10968 bytes
SHA-256: bbf9df785bb00a02fc4e3b7548d909a43e0d5ae012cdd671332476497ae203cf