Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a630e9b7ea1b19…

MALICIOUS

PDF

44.4 KB Created: 2021-06-08 14:58:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b27d34d5e152e42169329151c7246d6a SHA-1: 1f842a1433198554a87b1dbfed37479f1405c339 SHA-256: 70a630e9b7ea1b19b0f82a5fc32ce92b2edca958b1bcf5429b0b3afda19ce100
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'free game hacks' or 'generators'. The document body and heuristics indicate a lure to trick users into clicking these links, likely leading to further malicious content or credential harvesting. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://netcdn.tw/app/431946152/what-is-the-best-free-game-executor-for-roblox-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/more-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/robuxy-com-free-robux_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_off00004e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E44 25044 bytes
SHA-256: 8fbffcb00ec5aa8a231e16c50c5c5b37b70d49935cd561603470828bb1e8f40f
font_01_sfnt_off0000887e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x887E 19044 bytes
SHA-256: 33bcc124e1514d49052d15597efd4976a9bf2446bc5c516afca4eaafad26b84a

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