Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a88ab26b36396b…

MALICIOUS

PDF

74.6 KB Created: 2021-09-14 05:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c811d344e406b4bf49af52b7c779afc8 SHA-1: c643c9566792553ceebb72ae1ee68f805388ee70 SHA-256: 60a88ab26b36396b88de5ccb8135485a75e782d3e31bdcf6b70e3e6ac35e6c74
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous external URLs, some hosted on compromised WordPress sites, which are likely used to redirect users to phishing pages or download further malware. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • 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://laborke.ru/uplcv?utm_term=athiran+full+movie+with+english+subtitles PDF link annotation
    • https://dacinsara.ro/fckfiles/file/gunavumax.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ijsrrntptgdm9b0iqe5iblt6vi/divivitetowo.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/midosubikobugisowumag.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139ba077f381---16665667706.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/xitasirofu.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/04720cb825a33363778eb9a1d023e3c6/30256619245.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/mifob.pdfIn PDF document text
    • http://derp74.fooden.com/UserFiles/files/41654517705.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/38519039954.pdfIn PDF document text
    • http://esangsok.com/upfile/files/64809443079.pdfIn PDF document text
    • https://htchninc.com/d/files/lexib.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/kokumafisate.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/38082669458.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/95979e17db7d5fc1209706856bc17f67/29069033528.pdfIn PDF document text
    • http://clinicaveterinariasangiacomo.it/userfiles/files/ketatiratovobowefulem.pdfIn PDF document text
    • http://strap.sk/uploads/file/91339415667.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/27095516275.pdfIn PDF document text
    • http://vit-physio.de/file/zifux.pdfIn PDF document text
    • http://fibertechnique.com/tmp/file/salikitulaf.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/81827479333.pdfIn PDF document text
    • https://phuquiland.com/upload/files/tekalakinefizulefubivul.pdfIn PDF document text
    • http://teplospectr.ru/images/files/81531455338.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_off0000bdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C1 17364 bytes
SHA-256: 5f945603ee63c8eb216534be9eef6180666542297f1a3bba3fedba18790971b7
font_02_sfnt_off000102c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C0 11036 bytes
SHA-256: 567d563989645df5260a67c097bb2f45f08b57492e075d2570bfd78365c3c578

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