Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea13b631406ca62…

MALICIOUS

PDF

90.2 KB Created: 2021-09-23 06:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f2628d1f99fa97a43603311081914a75 SHA-1: 97375e73f6c423f8f7a72044f53d910fc1ef3fee SHA-256: aea13b631406ca628bd9d7460b2f4e1b1631b4cced35adc1369b510e002d1d6f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=wonder+woman+1984+movie+online PDF link annotation
    • https://mkycc4.com/kycc4.com/userfiles/files/37449034265.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/rapowuguniwojurukoweso.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/50781739532.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/naxejupupilinibirodevuz.pdfIn PDF document text
    • http://rassadaspb.com/new/files/file/wuvorokobulebepew.pdfIn PDF document text
    • https://woft-dining.com/webroot/editor-uploads/files/muvafufezabinepugili.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/suzilofutumulixevi.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/36292888203.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210909221419611.pdfIn PDF document text
    • https://billionbosses.com/ckfinder/userfiles/files/juxes.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/09/18/file/20210918_083216_125.pdfIn PDF document text
    • https://shinaltd.ru/images/file/xibagibade.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/19903341085.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/fibavamajavaburadoguvan.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/80817809046.pdfIn PDF document text
    • http://golfvillageonline.com/userfiles/file/66266565071.pdfIn PDF document text
    • http://allefrgycg.news-read.com/upload/files/44502486934.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/posavev.pdfIn PDF document text
    • http://chornakorn-packing.com/ckfinder/userfiles/files/tebenekogugebun.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/63706475777.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/27658169276.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ff31704bf---batob.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4b290ace2---50376387512.pdfIn PDF document text
    • http://s250801404.onlinehome.fr/img/uploaded/file/jolenesugulobemanuw.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_off0000fb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5C 10796 bytes
SHA-256: d0979103385d8ba34494d5eff5ccea4cf6f9af886370309afe2ae7641255f152
font_01_sfnt_off00011452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11452 18084 bytes
SHA-256: dd762456bddb3f52c132300d110350b3317ca5e6c2227ac3534f4648e07a9c97
font_02_sfnt_off0001435e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1435E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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