Malicious PDF — malware analysis report

Static analysis result for SHA-256 124e1f5f9f927a1d…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 00:52:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 47df8935a20138e18b27bcf53018dbae SHA-1: 87d08d31c86002864a64861340f9d236abdd183e SHA-256: 124e1f5f9f927a1d74aaea2a9b14f003b4f70b7aedf7b5e670a40b1ce13572de
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, including one to a known malicious redirector, designed to lure users into clicking on game hack or generator sites. The document body and embedded links suggest a phishing or scam attempt, likely to lead to further malicious content or downloads. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

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-play-online-free-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-tbc_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-hack-2021-ios_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/descargar-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-royale-high-for-free-no-log-login_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-a-pin-code-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-mask-hat_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-bee-swarm-simulator-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-gear-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-paid-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-counterblox-money-hack-script_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/bloxburg-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-coins-in-assassin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/fly-hack-roblox-no-cheat-engine-any-games_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_off0000347f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x347F 22540 bytes
SHA-256: c7083ba82c2ee9ce9e58462fd41828afc5f9f601055e7799a3675f0758fd4515
font_01_sfnt_off000066d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D8 18408 bytes
SHA-256: 2eb0d828dfa855e50b6f487a3982aca0132c195de516b629f3de2a521e966112

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