Malicious PDF — malware analysis report

Static analysis result for SHA-256 5464b1c7da88dbf3…

MALICIOUS

PDF

76.5 KB Created: 2021-10-07 15:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: cedd3992319bfc9310a43ec02d70c93f SHA-1: 7df85ea62613bf7daf5958247de81c1752e022c3 SHA-256: 5464b1c7da88dbf3d7f81200d7e3436235cfdb058aee71257087b3496e3e05c5
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, including one using an IP address literal. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to lead users to potentially malicious websites for phishing or further malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://archism.ru/uplcv?utm_term=christmas+in+handcuffs+streaming PDF link annotation
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/bujigalatelojekagufon.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e919e29f60---40975979788.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/zopojekatu.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/h8qp4foh2q2picenulnadd8c2t/vibidigupisupobosewogalav.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16152661d2fbf8---28237914047.pdfPDF link annotation
    • http://dilimkebab.com/userfiles/file/wuvebiv.pdfIn PDF document text
    • https://architektor.ru/uploads/file/wabonofedupake.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/tisomamasarijetofekil.pdfIn PDF document text
    • http://cegled.varosom.hu/userfiles/files/50140445694.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/32167075973.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/nitemosefilapilowufopes.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/30662755633.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/lopevetutajojivimirix.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/26484438580.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/35182736730.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/1154244486.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/xojixofuzowusaxusejume.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/vowiretavobozatapemalona.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/zaginubuvofowameledasapiz.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/sokerasatexa.pdfIn PDF document text
    • http://www.programasaudetotal.com/arquivos/file/34007943517.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/22911212611.pdfIn PDF document text
    • https://braveathlete.net/geektic/files/nisigufewadasiloxigigusum.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/61597968402.pdfIn 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://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_off0000c5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DC 17780 bytes
SHA-256: 80f6c0bb4199826880b02b19588acff2562d622f31239f8f927ae01e35768b8f
font_01_sfnt_off0000f407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF407 10888 bytes
SHA-256: 36694c9130a675fa4a087f3368bd337c2d5025eee3ef76b80c58cd916032a34f
font_02_sfnt_off00010cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1