Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61f13a478f30673…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 17:17:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: efec0589d4c72edd3355f35eea64964f SHA-1: 867239fb7416bc22ee34ca9f702768739a8e7df8 SHA-256: a61f13a478f30673970682efe80f5af1b555b1cdf93fbffc2e597fa56c9c2efd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or downloads. The document's structure and embedded links strongly suggest a phishing or scam campaign aimed at users seeking in-game advantages.

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/coin-master-free-spins-only-game-hack In PDF document text
    • http://www.sbairs.com/datas/files/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-free-robux-in-roblox-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/hilton-hotel-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-jordans-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-vidoe-star-egg-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/bacon-do-you-want-free-robux-buur_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/exploit-cheat-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/robux-cheat_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_off000030e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E2 22956 bytes
SHA-256: 792e512583df5a95c2528135f7f30d084cf9d12cc8db1de518c6318e30ece02c
font_01_sfnt_off0000646a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646A 18428 bytes
SHA-256: f57f8b21c02b66169ef231feeb17cfb16603379852549c8906bae8109884bca6

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