Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9fa07dc8c9f9be…

MALICIOUS

PDF

80.1 KB Created: 2021-09-15 22:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a595366c1b7f1f548efaa811ccfe835f SHA-1: 9953fadaa61888e61fdc058295d0078dd56bd9c2 SHA-256: 3d9fa07dc8c9f9be3cf72512c28f0c288c8f20d000e1c20f7a6db338a0c8b9af
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1553.005 Mark-of-the-Web Bypass

The PDF contains multiple embedded URLs, including one that appears to be a lure for downloading a game, and another pointing to a raw IP address. Heuristics indicate it's a link farm on disposable hosting and a callback phishing lure, suggesting an attempt to trick users into downloading further malicious content or engaging with a scam. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://coretry.ru/uplcv?utm_term=download+god+of+war+2+apk PDF link annotation
    • http://netmode.net/app/webroot/uploads/files/43363833655.pdfIn PDF document text
    • https://sicurezzaips.it/uploads/file/japebemomigofif.pdfIn PDF document text
    • https://semot.com/Store/userfiles/file/49688782595.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/karugikonugofok.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/jugifusav.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/69543010393.pdfPDF link annotation
    • http://www.kowel.com/ckfinder/userfiles/files/1631569984.pdfIn PDF document text
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/19875416623.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/cn5m3g0s59jahlaetk95qv0ri1/73899222879.pdfIn PDF document text
    • https://canoe.ro/Extras/ckfinder/userfiles/files/66761509888.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135192203ba9---32647866111.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/48497569905.pdfIn PDF document text
    • https://exam11.menapoint.com/app/webroot/upload/files/folijesugowopa.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/jafivanuza.pdfIn PDF document text
    • http://www.sushmitamukherjee.com/fckimages/file/radaduxasawabugikeneziniv.pdfIn PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/35206139883.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/44561061075.pdfIn PDF document text
    • http://skolky.info/foto/images/file/gifamazurefamukiv.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/93386078835.pdfIn PDF document text
    • http://velomagazin.hu/UserFiles/file/sutobuki.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/sogesekikedadivedaxari.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/fekuteveluzeriko.pdfIn PDF document text
    • http://sial.pl/galeria/file/12273802460.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/xegozapakivusez.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_off0000d48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48E 17820 bytes
SHA-256: 68f50fc087511c58a9a662dae9e5b4aa78f04b56862e6ae7960e3ab362a6dfde
font_01_sfnt_off0001034d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 10480 bytes
SHA-256: 1d342e7d5d85290ff8271b8a9c94e2480922aac6dfd8473b8a12648dc4fc0e54
font_02_sfnt_off00011b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1