Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a2e51c61780277…

MALICIOUS

PDF

44.0 KB Created: 2021-06-11 05:15:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 27cc9b8618892f0377d6eff844504cb5 SHA-1: 48365aecdc62d88213baff312bc58f8679a6ed2b SHA-256: 13a2e51c61780277d4ddb5bf3cb1205c672657671939fc137ed92db248235dc1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'game hacks' and 'free generators' for popular games like Roblox. The primary lure URL, 'https://netcdn.tw/app/431946152/como-hackear-roblox-2021-game-hack', is flagged as malicious. This suggests the document is designed to trick users into visiting malicious sites that likely host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/como-hackear-roblox-2021-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-roblox-character-animation-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pubg-uc-sale_GM1330123889.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-generator-2021-no-human-verification-or-survey_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
font_00_sfnt_off000052c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52C1 23376 bytes
SHA-256: e4978ab00c09476cebfa7222a597acbef45558604854e024b8fbb2e29002a171
font_01_sfnt_off0000878a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x878A 18844 bytes
SHA-256: 65219c95f8837bda4b76282ef9d2affbc183366985c0174b092060244ddbc53a

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