Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efdcb6b2f491152…

MALICIOUS

PDF

34.2 KB Created: 2021-07-08 11:27:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5f33fa749eeaccb353723593bb1f1ea9 SHA-1: 538c275de0092b02dda4cd00c8b5bac3697c5458 SHA-256: 2efdcb6b2f491152f09eba0040e04ea3fbbb38974ff857d22b00e284565916ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that are identified as malicious redirectors, specifically targeting users with lures related to game hacks and generators. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-facebook-game-hack. This indicates a phishing or scam attempt designed to redirect users to potentially harmful content or further malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.tw/app/406889139/coin-master-facebook-game-hack In PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/roblox-buy-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/roblox-free-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/roblox-ghost-simulator-cheat_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-do-u-get-robuxs-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/free-roblox-gift-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-robux-in-roblox-2021-may_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003083.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3083 22560 bytes
SHA-256: d1515a39287863df656625a0ce52fe03d4f865440a76fb091c81d20dfcc9788c
font_01_sfnt_off000062d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D2 18324 bytes
SHA-256: a6ed948cf24eb29c37458194fefc1f47b33ce3c9afefa5bc0bcdf74f8f7d5de4

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