Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d437336980e93d8…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 14:08:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d72e064204e83fd5741af5535fbf1da3 SHA-1: a2bfed97422d6289694e543084f98b3aeac47067 SHA-256: 9d437336980e93d844cc4c880aeaad84ae070a57f6c3ef8b52d0458a9eb3880b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, with a primary link identified as a malicious redirector. The document body and heuristics suggest a lure related to game hacks and free currency, aiming to trick users into clicking these links. No scripts were extracted, but the presence of malicious redirectors and the lure indicate 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/431946152/is-it-possible-to-get-free-robux-game-hack In PDF document text
    • http://librarysenior.com//repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-coins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/cheats-infinte-jump-roblox-fe2_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/20210-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-redwood-prison-hacks_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-spins-coin-master_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_off00002e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E09 21284 bytes
SHA-256: 57bf7602eea244b2554b00a81ee0bc6bb47dddd632eb4a982a6f348e23cd1a6f
font_01_sfnt_off00005c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C63 19168 bytes
SHA-256: f24a5ada971d965804af58b04ee5b9b6367f2e4ca5c866edee18a0a4d3da7d81

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