Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae27064ac41cacb6…

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 12:22:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5d3c65d1702fac87f6119bfb905752b1 SHA-1: 0c8fc45fbcb893fe27a13e71d3413b0194968bdd SHA-256: ae27064ac41cacb65b2fd8635e8b1219d141f7cbe2f845a71a5d5a1513585517
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to malicious redirectors and link farms, masquerading as free generators or hacks for popular games. The document body and heuristics indicate a clear intent to drive traffic to potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/free-robux-generator-2021-no-human-verification-or-survey-game-hack In PDF document text
    • http://library.acehresearch.org/repository/awesome-free-accesories-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/types-of-free-hair-on-roblox-not-model-for-girl_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-cheat-on-risky-strats-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-roblox-accounts-that-work-with-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-private-server-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-claim-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-kids-games-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/cheats-for-bloody-mary-roblox_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_off00003416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3416 21844 bytes
SHA-256: 1a574a73a5edd6ac4633863114cf7aa75410b198b2319b9c27b0a63ced67a642
font_01_sfnt_off00006405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6405 20028 bytes
SHA-256: c95f599563a13a8661a8d912b5a9bb1906bac0583db2f84c1a9fc087aebca576

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