Malicious PDF — malware analysis report

Static analysis result for SHA-256 df1cdec5bfb2c46c…

MALICIOUS

PDF

68.1 KB Created: 2021-09-23 18:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 32618899e47cc3d3d7fc114cf0d54077 SHA-1: 9c0bd55fc3fc1a71d1970e21b5845216fc14564f SHA-256: df1cdec5bfb2c46cfd9f722893017c35b4e2d41d4f18d2b7c69efafb60859b33
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. Heuristics indicate it uses an image-only lure with an action trigger, typical of phishing attempts. Embedded JavaScript and numerous external URIs suggest it is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://pixomot.ru/uplcv?utm_term=how+to+take+audio+from+a+video+android PDF link annotation
    • http://tanabuauto.com/js/upload/files/dulabosilaxurefuv.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/67805139120.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210913231355.pdfIn PDF document text
    • http://www.nbc.com.vn/ckfinder/userfiles/files/dinigumarezeluna.pdfIn PDF document text
    • https://sjaindonesia.com/sitefiles/file/ragowobifaj.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/keponibu.pdfIn PDF document text
    • http://theseadiaries.com/ckfinder/userfiles/files/boseta.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/vesedodezowa.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/12541125343.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613146c44433e---bofawolaxidatefu.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5abd68e46---fajowulaferaregavoz.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/tojovivomidiluxevoberi.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/mapavotoxonubo.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/88230401903.pdfIn PDF document text
    • http://wixoon.hu/upload/file/68091495592.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/luvemobiboxisinesuma.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/75006067465.pdfIn PDF document text
    • https://ceccarmaramures.ro/userfiles/file/26287876662.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/74750336971.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/tumixa.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/keneronofunisazejufe.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/42051457301.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/pavalapiwelaluzum.pdfIn PDF document text
    • http://tianfonmm.com/d/files/27948069107.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_off0000af1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC731 14184 bytes
SHA-256: e66f1e377070c4f9836bb286b88222287d00991a21c432ad7ad5fb726fb0cfc1
font_02_sfnt_off0000ea4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4D 10636 bytes
SHA-256: b5b31fd27dd2e420a37b3eae1314565811ee01e2a7faa10a85dba36da2da5905