Malicious PDF — malware analysis report

Static analysis result for SHA-256 992b9e6c299fc3a9…

MALICIOUS

PDF

72.3 KB Created: 2021-09-26 09:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0a3267453698d4ce1b63bdbbfaa2136c SHA-1: 24bcd9de18c745843e56d18c807d5c0436689c43 SHA-256: 992b9e6c299fc3a995f48074d8e9c6c7a6fa8fb36ede729bbaed8b979399023e
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. The presence of numerous external URIs, many pointing to potentially disposable domains, suggests a link farm or phishing campaign. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5715

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://carscaso.com/js/upload/files/14650661623.pdf In PDF document text
    • https://drlanda.hu/user/file/82508325633.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/rinaxuroresasugekoropu.pdfIn PDF document text
    • https://nada70.org/userfiles/file/10583489779.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/71110624173.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/jufozasaso.pdfIn PDF document text
    • http://doxetrilinh.com/media/ftp/file/javutabidetejonurasupev.pdfIn PDF document text
    • https://costarica4d.com/contents/files/45581479881.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/fuwuwevefivarapusibusu.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/kumipisututemudaxu.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/14681678702.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/9600634541.pdfIn PDF document text
    • https://karlschool.org/uploads/files/202109192302106697.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/napepasosajotoluwibuzalul.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/jakapigoxojunato.pdfIn PDF document text
    • http://tianfonmm.com/d/files/73796423560.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/73778986110.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/10909370053.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/wasibower.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/deravasu.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/11423512123.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/kagijixupujisi.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e754265538---totadubesotepej.pdfIn PDF document text
    • http://jamones-luna.shopcloud.es/ckfinder/userfiles/files/78985096845.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/93833340766.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=check+previous+notifications+androidPDF link annotation
    • 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_off0000c0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F9 18748 bytes
SHA-256: e0fe9766f7d522b1197f3b7c7acb73e070186cd4b6107a518eff1f2071cc02db
font_01_sfnt_off0000f18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 10960 bytes
SHA-256: 762c8e8fd467066b8a6198112843c9860ef6afd50c78902dc28fca233a3a0832
font_02_sfnt_off00010afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.