Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96bce02dccc55c0…

MALICIOUS

PDF

83.1 KB Created: 2021-09-19 16:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0ce3d190e8bf6c7297a216a14469452f SHA-1: 19ec8acb9092170f68ea490e3c0c47fb2e72b689 SHA-256: b96bce02dccc55c0e3dce5d25f0b26405df24f8e63e8dd1d4da820244559a6ee
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous disposable URLs, a common tactic for distributing malicious payloads. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to decrypt a password-protected archive, a method used to bypass gateway scanning. No scripts were extracted, but the overall structure and URL patterns suggest a downloader or droppper functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://hebatkeren88.com/contents/files/96218558890.pdf In PDF document text
    • http://sns-russia.ru/userfiles/file/86454150024.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/nipagiwon.pdfIn PDF document text
    • http://sinice-rasy.cz/files/file/sosiwugovepavegoko.pdfIn PDF document text
    • http://mayingiabao.com/upload/files/49409943342.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/jalop.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/35762205599.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/sotetawete.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16142f7264493d---robam.pdfIn PDF document text
    • http://qualityfirstservices.pro/testingsites/advantage_aviation/assets/media/file/50228405828.pdfIn PDF document text
    • https://ginecologmuresan.ro/ckfinder/userfiles/files/12962218068.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/mofowomeratikewazo.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/28979916150.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/6179328949.pdfIn PDF document text
    • http://cuanhuadanang.vn/uploads/image/files/66475286968.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210917135530.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/jopenawabaton.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/rovoxotejiwoki.pdfIn PDF document text
    • http://kaitianjinghua.cn/admin/userfiles/file/202109070632151385.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/bapipivesaj.pdfIn PDF document text
    • https://bawauang.com/contents/files/fituvuboruvudalaj.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/8c9d968d3969254494e6d115f05a28df/vopusu.pdfIn PDF document text
    • http://goodlack.cz/userfiles/file/wejovadugesavonuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=export+texts+from+androidPDF 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_off0000df66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF66 10700 bytes
SHA-256: b9e191674810c70fb80fb8f7b294e8b14c6348d047ec2f170794aa869dd343cd
font_01_sfnt_off0000f7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F1 18176 bytes
SHA-256: 91ed0006274fc9e7b3bc15bae90c86381fdc2b6f24df841e5e6d3bf30d931b6a
font_02_sfnt_off000126a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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