Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6454263e304ae78…

MALICIOUS

PDF

80.6 KB Created: 2021-09-23 00:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0b76e7220aec8fb1cc527775a4fe24cf SHA-1: d965c512492c61e30d4e1f8fab96062b50efe1d0 SHA-256: e6454263e304ae78a1222cc6a7f19a619367052ccc96350ad42e12e28078238c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates these links form a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • 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
  • 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://www.plain-pied.com/editeur/ckfinder/userfiles/files/41894023221.pdf In PDF document text
    • http://kangmeideyiliao.com/uploadfile/file///2021090507513754.pdfIn PDF document text
    • http://tichdiem.surecare.vn/uploads/userfiles/file/zolorevenoju.pdfIn PDF document text
    • http://hide-bo.com/img/tmp/file/vidorosavajarobevi.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62421985975.pdfIn PDF document text
    • http://mesterteto.hu/userfiles/file/jorenozapabodomufu.pdfIn PDF document text
    • http://okgwa.net/50/files1/file/gewexawubivux.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/negopemofimap.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/75053732522.pdfIn PDF document text
    • https://khachsan295doson.vn/namthuan/images/news/files/xibawovilijefatizupuvemiv.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/72136127117.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109112121115694.pdfIn PDF document text
    • http://eskuvotoszkanaban.hu/editor_up/nutorizoleselijakoj.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/zulef.pdfIn PDF document text
    • https://xulynuocphangiathinh.vn/images/pic/file/noline.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/pekabatege.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/46179536564.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/26071012396.pdfIn PDF document text
    • https://agregadoschucuri.sinecsas.com/ckfinder/userfiles/files/mipofanurezofew.pdfIn PDF document text
    • https://altsovmun.ru/userfiles/file/nosipitalamedozafatav.pdfIn PDF document text
    • https://alkoplast.rs/files/fopitolaferon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=free+german+books+for+beginners+pdfPDF 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_off0000d89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89A 16852 bytes
SHA-256: 48080e0f646f01eb8fac30c27a269a97037b04bda12b6ffd115ac3f2b025199a
font_01_sfnt_off00010401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10401 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C18 10904 bytes
SHA-256: 2c4195968321ec67e9172fd9beaf7d99daf9476cba42567910eafe68aaca6a37

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