Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9aad70cc770da1a…

MALICIOUS

PDF

45.4 KB Created: 2021-06-02 16:42:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 44fa2558f5f3f44e6f53478c356d299c SHA-1: 9a887f37dcfa9205b4b6545c28fb18846621c9a3 SHA-256: f9aad70cc770da1a7fc93d8015def1e0a3d019f14e151e7c5c8969438e8e54bb
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links that redirect to a link farm of other PDF documents, many of which are SEO-optimized lures for game hacks and generators. The primary URL, https://netcdn.xyz/app/431946152/how-to-disable-colllisions-on-roblox-with-cheat-engine-game-hack, is presented as a direct download or information source for a game hack. This pattern suggests an attempt to drive traffic to malicious or ad-filled sites, potentially for monetization or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/431946152/how-to-disable-colllisions-on-roblox-with-cheat-engine-game-hack PDF link annotation
    • http://axiapublishers.com/images/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://axiapublishers.com/images/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://axiapublishers.com/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/call-roblox-for-free-robux_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/free-robux-games-that-actually-work_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
stream_004_off00004fd0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FD0 26504 bytes
SHA-256: cc642f920ed52058d56475a83c8aac8d3b85c388b46fc26d6fd634879829d709
font_01_sfnt_off00008bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD3 19220 bytes
SHA-256: 8523ee1fcdc31ca79bd8c600a4fb449282c97aca61ff3114052e70d86daf630d

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