Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5f8097c18e050c…

MALICIOUS

PDF

82.9 KB Created: 2021-10-05 23:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 197bcbf3f0dce55d49e5b260ceec6da1 SHA-1: ef8d397e80aed3110921bb78659900966c4cbe8f SHA-256: 9c5f8097c18e050ccfcfb0149b177dca803818080ecba0547c9264d3068320b8
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It contains numerous embedded URLs, many pointing to disposable hosting and configured as a link farm, suggesting a phishing or malware distribution attempt. The 'SE_CALLBACK_LURE' heuristic indicates the document may also be designed to trick users into calling a fraudulent support number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://allytemp.ru/uplcv?utm_term=the+road+to+freedom+pdf PDF link annotation
    • https://golf-tout-terrain.com/publish/page/file/60592396394.pdfIn PDF document text
    • https://pansky.ru/UserFiles/File/zusisubekelitozejuluw.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/20430620616.pdfIn PDF document text
    • https://loyd.rs/images/file/25117287719.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/62760129989.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/3627854447.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/72749507159.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/fokuwutuvulireliweled.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/zidasopum.pdfIn PDF document text
    • http://furniture83.com/upload/files/bugipisoboborozabujidufi.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/lifixujoke.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-10-1/20211001045316510531.pdfIn PDF document text
    • https://indolabtek.com/Uploads/userfiles/files/dikeze.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/talunazazajutem.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/40800885249.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/41608536628.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/diwemovod.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013/admin/ckfinder/userfiles/files/60932403304.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/kuxodumuxawibujufasurefo.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/92857062236.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_off0000d829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD829 21080 bytes
SHA-256: 74e12eb370a52ae17e3aa2e482338af3e3b8340adf9e625c4941e6dbfb3d9608
font_01_sfnt_off00010efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFE 10316 bytes
SHA-256: 22cdfa03108643162fff6cc50186e335f71a9b4010459f3e3d79572bff527bd7
font_02_sfnt_off0001263f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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