Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e67189203c4a26…

MALICIOUS

PDF

68.7 KB Created: 2021-09-29 05:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 61498c8fecb55d646a886287277f3e9f SHA-1: dd085b14ef589ec598e5784af100e22c16a6c380 SHA-256: 64e67189203c4a26ed88f74e2a1059d4d7cfa1ecf7d28f83ac46c4f8370b49af
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to obscure the malicious intent through a large number of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • 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://thaihotelsale.com/FileData/ckfinder/files/20210909_016E224F881A21EC.pdf In PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/wodulisug.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/27629299228.pdfIn PDF document text
    • http://newbiesites.com/userfiles/file/fasepu.pdfIn PDF document text
    • https://ewt.cz/res/file/miguna.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/87361784783.pdfIn PDF document text
    • http://kelsenator.com/userimages/45363217399.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/38326944536.pdfIn PDF document text
    • http://apart1day.ru/file/wazagot.pdfIn PDF document text
    • https://znalac.com/userfiles/file/2030869168.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/jadobedibovel.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/tokunimenazotugatog.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/62966728772.pdfIn PDF document text
    • http://kechengchem.com/upload/files/85999456112.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/nunabotavuwusotaloz.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/zofizobetemukel.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202109281652527320.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/fujotatud.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/fozupe.pdfIn PDF document text
    • http://balalajka.nu/media/74246332961.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/1456644702.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/63752907729.pdfIn PDF document text
    • http://nifaelectronics.com/userfiles/file/22011727153.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/60542556892.pdfIn PDF document text
    • https://rippa.pt/files/file/rizilutezer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=god+of+stickman+3+hack+apkPDF 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_off0000af82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF82 14588 bytes
SHA-256: 0f317438a78ef00323a1f15aaf506287d331fd478d4bbf020b5b67cfa233e918
font_01_sfnt_off0000d457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD457 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 10908 bytes
SHA-256: 63618a31cb161e16e3c1ebc36d861b669e61849cc05ffd1499d9b44c787fe189

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