Malicious PDF — malware analysis report

Static analysis result for SHA-256 74040f24948028ce…

MALICIOUS

PDF

69.3 KB Created: 2021-10-06 02:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 43330b3ac15f265620786112805b230b SHA-1: 9ed0e57c01476d0c2bea89dd0dbc59c68850ef7a SHA-256: 74040f24948028cea0f9d06f9ff4a30e54ef9ff568693c2c2daa4049bb727d4f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting. The ClamAV detection and the heuristic identifying it as a link farm on disposable hosting strongly suggest a phishing or malicious redirection scheme. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3555

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://www.sport-konyv.hu/userfiles/file/54477550390.pdf In PDF document text
    • https://trieurodata.ro/images/file/risemedewopavuvajukeg.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/timoradupili.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fb44a4e2b6---lekiperinup.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/88979535958.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/zalomig.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/67880677910.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/daloforezo.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/ramefa.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/vifepofobenijoduwobu.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/korukug.pdfIn PDF document text
    • https://incense888.com/uploads/files/202110010353577964.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/katadulixexe.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/jibagogo.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/sijogepiwirosoxubozumuten.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/wewifikuko.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/10672879514.pdfIn PDF document text
    • http://wuchem.com/upload/files/20379345741.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/34093117616.pdfIn PDF document text
    • http://kp-technik.cz/ckfinder/userfiles/files/35415091657.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/77108910162.pdfIn PDF document text
    • http://nattukoottam.com/userfiles/file/4204492155.pdfIn PDF document text
    • https://coil.hk/upload/files/7755074639.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/damoxuwurilativemaletus.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161459a891df31---sikefife.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/12361804816.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=cube+of+any+positive+integerPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEA 10940 bytes
SHA-256: b800acd57bbe4c6f9913b6b8cf9e3553c696bf23ceb55094dcbaac32619b2234

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