Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63fb2e0b795067a…

MALICIOUS

PDF

83.7 KB Created: 2021-09-17 03:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 98e5c0be28fdc45635a98c6a18b7780d SHA-1: 5413e97192588eb2236d13fbaa67e2762f5f1192 SHA-256: d63fb2e0b795067a5629b1f36f8ad8fc63fa3d0d8b7d0511e0a18d9c3400d3c9
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or tech-support scam. The document body is heavily obfuscated, but heuristics indicate it's a link farm designed to redirect users to potentially malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to trick users into visiting external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://jeanchapleau.com/userfiles/file/tuguvix.pdf In PDF document text
    • http://gammatradings.com/userfiles/file/80289448903.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/69594270836.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/22253776832.pdfIn PDF document text
    • http://cokhivietuc.webthoidai.com/img-vietuc/files/83364063387.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/jipanixubenaxun.pdfIn PDF document text
    • http://gaestehaus-am-erlkoenig.de/img/editor/file/69058740763.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161410d0d90b5d---vugidexelizosokagowaf.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/41915161004.pdfIn PDF document text
    • http://zgic.ru/!upload/files/26149676744.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/tejejebupusawim.pdfIn PDF document text
    • http://controlsystemco.com/cache/fck_files/file/rerafigonopefizif.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/88762574390.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345f8d3fb76---99570966202.pdfIn PDF document text
    • https://peterdegendt.be/file/jiwomunitujevibebuvaba.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/43770394170.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/jalogosixidibuk.pdfIn PDF document text
    • https://ratosatu.com/contents/files/90672103310.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/24564333106.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/23324364636.pdfIn PDF document text
    • http://pataibicaj.hu/userfiles/file/94625635921.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/legebodari.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/wotefu.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/87205308161.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=j7+flash+filePDF 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_off0000e301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE301 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 18308 bytes
SHA-256: 841cd07bc556d165807156595bf77843e54150483b81bbbd53871e8079f13972
font_02_sfnt_off00012b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6A 9928 bytes
SHA-256: 2563745437ba7d7aa6c642a2a5687f78efe0078dc95ef465f5fb7ea6505e2da5