Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b016ba149118a0…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 20:38:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 907001a0430400f9a029bba4c9ea26f5 SHA-1: e292ab4d9a4fba91b1273ee0901f7d6379afde2c SHA-256: b7b016ba149118a074954789913fb1edf5936e30003aee3512ca4b7be18391e2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically designed to lure users with promises of free game currency or hacks. The document body and embedded URLs strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/431946152/free-robux-discord-game-hack In PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-robux-hack-free-download-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/2021-fe-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-sex-games-free-entry_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-accounts-with-obc-and-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-do-you-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-aand-true-ways-to-get-robux-windows-10_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/5-roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-f12-cheat_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-pe-hacks-ios_GM479516143.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_off00002f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5B 22488 bytes
SHA-256: 43c1b7acc9011cd766a63acaa17c2d60ffe688202048336c543b09f9dfec0cab
font_01_sfnt_off00006181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6181 19176 bytes
SHA-256: 020ce166f16710322681f054c1b4dde0a486d6154bce33e9144977aac3b53b16

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