Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e14db680634965…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 16:37:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c196fdbbbc4ee9deafbf33e5b3bf1b51 SHA-1: 42f58b9bfcbb39b2963498971c1273d6dea62c0e SHA-256: 27e14db680634965500b2a094e259d19e18349372f7d24da91b4be59a0f7373e
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them by promising free game currency or hacks. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or exploits. The document's structure and content strongly suggest a phishing or scam attempt, leveraging popular game themes to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-hack-spins-ios-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/a-tool-to-get-free-in-roblox-purchases_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/cheat-dungeon-quest-roblox-20s_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hack-system-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-games-on-roblox-that-work_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-roblox-items-on-to-your-account_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-cheats-to-get-2021-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-can-i-be-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-offers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-no-hack-or-cheat-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/insane-how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hack-for-apocalips-rising-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-rare-cards_GM406889139.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_off00003275.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3275 22668 bytes
SHA-256: 3eee4010a503db4b4e77a21793d27080c3ffb8e35a0478ce65f806a050f9b82f
font_01_sfnt_off00006533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6533 18180 bytes
SHA-256: 8d127c5bb32b619c47a60760147d13e4fdf9b6a0d766bd40fdbe03810a814be5

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