Malicious PDF — malware analysis report

Static analysis result for SHA-256 6109e027a55b6128…

MALICIOUS

PDF

33.8 KB Created: 2021-07-09 18:30:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: dd5847be092e9de70359d794a452e3f1 SHA-1: a0298982f333c7a63570e6ceae005a8d0ef155e9 SHA-256: 6109e027a55b61286f276d10e088756258ddff50de93a3a9bdde46730d69933a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and game hack lures, aiming to trick users into downloading further malware. The primary lure is a link to 'como-hackear-coin-master-2021-game-hack', which is hosted on a known malicious domain. The document body and embedded URLs reinforce this social engineering tactic by promising free in-game items.

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/406889139/como-hackear-coin-master-2021-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/giving-away-free-robux-cards_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-things-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/robux-today_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/cm-free-spins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-stuff-on-pc-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/install-roblox-free-robux_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_off00002df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF3 22492 bytes
SHA-256: 2307645b21233727442ba8d39897c7176ff2c697c8dae16b7bd4c1768f3c41e7
font_01_sfnt_off0000604e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604E 18664 bytes
SHA-256: edb2623ad104b8b86e5bc1c5ef1b50296b358dc4eff6a16b1f212eab3163f8bc

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