Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd904357db547336…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 08:01:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8e60e847a369c94c90ae72fec5cfb82c SHA-1: 70068ebea1f9090727a45b7794f96b8f44deeb81 SHA-256: fd904357db547336a99383d0c3b7f3711aa5e672778fb8290bad3dd46c0c8ebb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, which is designed to lure users into clicking on game hack generators. The document body and extracted URLs indicate a social engineering lure related to popular games, aiming to trick users into visiting potentially harmful websites. No scripts were extracted, but the presence of malicious redirector links and the lure suggest a phishing or scam attempt.

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-daily-free-spins-and-coins-game-hack In PDF document text
    • https://yowchang.com/image/data/files/auto-rap-battles-roblox-hack_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coins-master-hacks_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/free-redeem-code-robux_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/roblox-comment-mettre-un-script-cheat_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/how-to-get-free-robux-button_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/free-glitch-murder-mystery-free-knifes-roblox_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coin-master-rewards_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
font_00_sfnt_off0000341f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x341F 22232 bytes
SHA-256: 1e011a8905b68620e1e0cde3eeb1650167db3127657d08ad01e5fbf396ee74d5
font_01_sfnt_off00006565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6565 18772 bytes
SHA-256: a1dc96cae1db032b501f6986f060f4567329d4c170f8890bd2780cb4b8189df7

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