Malicious PDF — malware analysis report

Static analysis result for SHA-256 b697c9bd5436e13b…

MALICIOUS

PDF

81.4 KB Created: 2021-09-23 18:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b6777afcf43c6f0a7529e1ce28e42238 SHA-1: 8d9dee2fe43b272c8e908912812bde47ba06c481 SHA-256: b697c9bd5436e13b38bce7a7702feb864cc4c79a42e51acc3e048b5c0c8d0326
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious websites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://synerhu.ru/uplcv?utm_term=examples+of+narrative+analysis+in+qualitative+research+pdf PDF link annotation
    • http://conhantaoankhanh.com/webroot/img/files/guvituv.pdfIn PDF document text
    • http://cy2hand.com/userfiles/ziborazux.pdfIn PDF document text
    • https://www.suep.gr/ckfinder/userfiles/files/zagiwa.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614afabd8c119---budejekexa.pdfIn PDF document text
    • http://copy-office.it/userfiles/file/34397246824.pdfIn PDF document text
    • http://clubsahdianagalati.ro/upload/editor/file/8012763622.pdfIn PDF document text
    • http://tecksco.com/upload/files/xuxeni.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/31415095574.pdfIn PDF document text
    • http://ingatlanfelugyelet.hu/uploads/file/93168307660.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/60619290828.pdfIn PDF document text
    • http://chafewyuok.handysociality.com/upload/files/89923061416.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/nimiwufififuzafiletav.pdfIn PDF document text
    • http://3sdent.com/upload/files/46226299023.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/gerominemawubonup.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/66833743158.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210921050125.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/dutagenabegetijite.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/43096665508.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/rimana.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/fibal.pdfIn PDF document text
    • https://mabuksusu.com/contents/files/xigosigikarivapi.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/rerolofapiwitof.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/52737510991.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202109221112487949.pdfIn PDF document text
    • https://wasael.com/userfiles/file/duborakizupuzererezug.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/19893539824.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_off0000d60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60D 18108 bytes
SHA-256: 60103b79a151fcc01c310ea9f75cf780b86ef83ab90a800a3446b1cf46135175
font_01_sfnt_off000104dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DC 11396 bytes
SHA-256: e4f3e8519adf272dbeabc6be00ce4a20616353cbdf6267ec477dd6bbbbeec3e5
font_02_sfnt_off00011f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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