Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08f3119da69aa82…

MALICIOUS

PDF

82.2 KB Created: 2021-09-22 10:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6a465b759d856200504d2a3f7487bb36 SHA-1: eefc2cc51c7aedf7d83d1d067d71973fe2042057 SHA-256: f08f3119da69aa820b2428d9ebcfaae5d61a2157e93e835c09bca18ee0567691
134 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 disposable domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://treasurehunterdetectors.com/ckfinder/userfiles/files/sibaxolizabizezatojusumiv.pdf In PDF document text
    • http://lighthouse-connection.at/myPix/file/rokukilenapija.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/47125547287.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/muxefimojovepo.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/tejazidotifolemik.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/fusugutedolinetawot.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/23025907799.pdfIn PDF document text
    • https://szelvedojavitasmiskolc.hu/files/files/jejabisad.pdfIn PDF document text
    • http://belstroyiz.ru/img/file/sikojazamekepida.pdfIn PDF document text
    • http://ltpbetel.ro/userfiles/file/jupoj.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408615cf1d5---94310977406.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/46381577031.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/17370961102.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/39175590542.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/91118895705.pdfIn PDF document text
    • http://southerncross-ex.com/images/blog/file/nebelalorovemi.pdfIn PDF document text
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/58700893983.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/vebanewowutonuz.pdfIn PDF document text
    • https://upaspor.com/resimler/files/10207241686.pdfIn PDF document text
    • http://giayviettri.com/img-ftec/files/wozukig.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/wuzusujabevobimom.pdfIn PDF document text
    • https://tch.lu/files/files/10573109140.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/4381565197.pdfIn PDF document text
    • http://karinameal.ru/imgdish/files/31066950375.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/gukabeneverefol.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/dafexepiganixakisusakage.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/semibizazibesitu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=apowermirror+apk+full+versionPDF 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_off0000dc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC10 17676 bytes
SHA-256: f6c57b897ac0b8d263e754027e27f6dd09284b28f71f09ed394b733c0f536cdb
font_01_sfnt_off00010a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A30 10748 bytes
SHA-256: 17b0b5ad24aea5a4d3f83d5cb537d3ffe799de6aff48bd53bfafff29ae0831ac
font_02_sfnt_off000122f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1