Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13e442fc8cf07ef…

MALICIOUS

PDF

70.2 KB Created: 2021-09-16 06:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7c49508e0701bbe44357c9e01817dbe1 SHA-1: b1957bf9469084af1934d89cde73a21ae99dd442 SHA-256: f13e442fc8cf07ef5796207a10ba490c991a6e11f9ea0010a6ac31f49b75ec88
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were extracted, the presence of numerous embedded URLs, many pointing to potentially disposable domains, suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://el-master.ru/userfiles/file/79862334989.pdf In PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tarep.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/97323421473.pdfIn PDF document text
    • http://i-physiology.ru/upload/85861221796.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a673503691---zujanix.pdfIn PDF document text
    • https://stw-nowogard.pl/download/file/sanoze.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/fesaxupukopek.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/jagubepizotusetuxifamigo.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/21812862292.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/dolol.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/matixe.pdfIn PDF document text
    • http://yotlist.com/uniformkontakt/userfiles/image/files/82345852453.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/161344fd22bfba---10652781086.pdfIn PDF document text
    • http://jeykrishnaclub.com/images/file/89409518767.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/degubisos.pdfIn PDF document text
    • http://snft.ro/media/file/76322687031.pdfIn PDF document text
    • http://dothi.info/images/files/72461364905.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/koruvexevejono.pdfIn PDF document text
    • http://offerparts.com/upload/files/xemajiwowukowerikag.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/dibananovurifedefovufab.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/folugovijedubovapevo.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/66799086474.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+do+i+delete+gmail+from+my+android+phonePDF 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_off0000b328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB328 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3F 10968 bytes
SHA-256: 72dc808a88fab8caa50fb2f1399889f9d1f2bcdc30ca0528cda501f1362fe9bd
font_02_sfnt_off0000e43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43C 15380 bytes
SHA-256: 60d15739fd8510827251cb9ba523d868f6c1413f98011fbf4d67993d0296a8f1