Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62e4287c0d00db6…

MALICIOUS

PDF

82.4 KB Created: 2021-09-21 06:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f168c3cc49279d9b3b5674d33ae7cb68 SHA-1: 9d5268b918d95075d04b27d9c2e5db355b4fd0c8 SHA-256: b62e4287c0d00db684646dfac3b87754df48cb821820166533aca64c6478747e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan distribution. It contains a large number of embedded URLs, many of which are designed as link farms and redirect to disposable hosting, suggesting an attempt to distribute malware or phish for credentials. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://chcial.ru/uplcv?utm_term=crossfire+apk+free+download PDF link annotation
    • https://weborder.cloud/userfiles/file///bezemivufogatokokulejeb.pdfIn PDF document text
    • http://brenderup.ro/mm/file/nuwopaxaxobaponewanusiz.pdfIn PDF document text
    • http://banquat.com/userfiles/files/woxidexosod.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/fuxofoliboninawuwasebeg.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/90387022230.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/20984461127.pdfIn PDF document text
    • http://benly-carson.com/product/files/limatamarajefasig.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/49179628331.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/17818521302.pdfIn PDF document text
    • http://ozcetinler.com/userfiles/file/rufevividageroruni.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/vizikelanidobapuxuron.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/buziw.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614184627fba2---noxalonosibidesozid.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/rewoguvenudulunopo.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210909/210909233043799791avhuha9smenf.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/3670357382.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210914044359.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/10909370053.pdfIn PDF document text
    • http://chongthamphucthang.com/images/news/files/gumaponomebosose.pdfIn PDF document text
    • https://ausztriasi.spawellness.hu/upload/hirlevel/files/90886171829.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/87594970252.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/noridufumuwirus.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_off0000dba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA3 10604 bytes
SHA-256: 0c499a3ce84977de1a9026af6966474c48a589a68523a39de6f83cb84208f75a
font_01_sfnt_off0000f404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF404 18396 bytes
SHA-256: 9f9a735240c8e38d42591642699fe261f83dd3b6dc070acd8290bb8638542efe
font_02_sfnt_off00012402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12402 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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