Malicious PDF — malware analysis report

Static analysis result for SHA-256 b006e1b4bef94bfc…

MALICIOUS

PDF

34.0 KB Created: 2021-06-19 17:42:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1d81169632e148a1a4e8d3d1ecf2f750 SHA-1: 670a12ed1c848c1b08a075d484c50609394a24c2 SHA-256: b006e1b4bef94bfcfcfd2a53ce519f646e3686b3bedcddf41ff78eb2c4c47be9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs that lead to a malicious redirector, masquerading as a generator for free in-game items and hacks. The document body explicitly mentions 'how-to-get-everything-free-on-roblox-2021-game-hack' and links to suspicious domains, indicating a phishing or scam attempt. No scripts were extracted, but the PDF structure and embedded links strongly suggest a lure for users to click through to malicious infrastructure.

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.co/app/431946152/how-to-get-everything-free-on-roblox-2021-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-things-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/100-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-backpacking-hack-script_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/100-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-cheats-for-name_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/who-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-cheats-to-get-into-robux-game_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-promo-codes-roblox-not-expired_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-minecraft-skins_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_off00002e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E71 21424 bytes
SHA-256: 31b78a6725cfbb9ee8620567d15c150fcfd2ae58ab5983388b024cfc55caa0d4
font_01_sfnt_off00005d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1A 19900 bytes
SHA-256: 25f1eba25e9c713341d81fade1e1e88fa3cf9db813acc312fac69a8c3cd863e7

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