Malicious PDF — malware analysis report

Static analysis result for SHA-256 d604240011683de9…

MALICIOUS

PDF

72.6 KB Created: 2021-09-25 06:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c6369d005e01aa600d6645945d90693e SHA-1: 96096c2047861d4e61e2abd53d81aea1521e997f SHA-256: d604240011683de906187f12a16fe58b55e34668714d22d20f3a026b91bc82da
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is used to redirect users to malicious websites, likely as part of a phishing campaign or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=seven+brides+for+seven+brothers+full+movie+download PDF link annotation
    • http://vuonlan.vn/data/upload/files/pasip.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/rulepafogufafobawixun.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/zodugunojuzomaremarot.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/zafozalupusadifome.pdfIn PDF document text
    • http://kleiberit.ru/files/file/76684812383.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/22677384963.pdfIn PDF document text
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/27028532622.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/sizepoxafofokived.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/35897056050.pdfIn PDF document text
    • http://omni-links-europe.com/images/blog/file/29340135645.pdfIn PDF document text
    • https://lotte-ppta.net/beta/assets/file/71316903477.pdfIn PDF document text
    • https://altsovmun.ru/userfiles/file/41547479589.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/xikakujefuked.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210918023511360.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/55850665930.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/perijemirelulugogolevomog.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b77450bf20---78048068457.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/lokilij.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/87039697789.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/geduvabofejalogoj.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/gexilikadil.pdfIn PDF document text
    • https://szallas-karpatalja.hu/upload/79149993865.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/ditukoboxaxotimesewuwoz.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/maneka.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/digujigekefo.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_off0000b65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65B 16520 bytes
SHA-256: 3e16b2205e601e34bf08c66283b7dae14b7c89b13a6d3db7aee4f1264196982b
font_01_sfnt_off0000e0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A2 11088 bytes
SHA-256: bc48f2390e118dea7061d47ff9831f9d8578bf9488fe7f93fe1ffb8d00eca914
font_02_sfnt_off0000fa5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1