Malicious PDF — malware analysis report

Static analysis result for SHA-256 19369cffcff8446a…

MALICIOUS

PDF

33.2 KB Created: 2021-07-03 17:56:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c05f35c832931376fef01d7309ba87f1 SHA-1: 6d54b666692be270fbbf5c5af4ba6be0a6039ed5 SHA-256: 19369cffcff8446aa9319db2dbe6f3ee6db75f7d3b1a093e7eb7c61990e89561
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, masquerading as a generator for game hacks and mods. The document body and embedded URLs strongly suggest a lure for users seeking cheats or in-game currency, which is a common social engineering tactic. The presence of multiple redirector links indicates a high likelihood of the user being sent to a malicious site designed to host further malware or phishing content.

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/479516143/free-mods-for-minecraft-pe-game-hack In PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-a-lua-injector-for-hacking-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-hack-roblox-accounts-v3rmillio_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/rbl-robux-gives-hack_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/get-robux-com_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/can-i-hacked-my-own-roblox-account-got_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-date-and-time-hack_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_off00002f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1B 21728 bytes
SHA-256: eaeb7721488d78d164b2eb89d54d8aea79b8334913ef027278e4890c7b3abc18
font_01_sfnt_off00005eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB9 18324 bytes
SHA-256: 6654eaae5534462051d4d15c9b2a2db406e5011fb4f6a93ce1582a2079ce45bc

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