Malicious PDF — malware analysis report

Static analysis result for SHA-256 1093ed80ca72fc4e…

MALICIOUS

PDF

34.2 KB Created: 2021-07-02 08:26:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 56fb04a22e866bc7596f78ec42ef5cf9 SHA-1: 378c604ce98c99eecfc8c14e05730c0c830e3d15 SHA-256: 1093ed80ca72fc4ed19dcdc5f2b9e6c374d7023710b01225d706dc01655cf71d
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector infrastructure, masquerading as game hacks and cheats for popular games like Roblox and Coin Master. The primary lure URL is http://netcdn.co/app/431946152/roblox-catalog-heaven-best-weapons-free-game-hack, which is likely used to deliver a second-stage payload. The ML classifier also strongly indicated maliciousness.

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.co/app/431946152/roblox-catalog-heaven-best-weapons-free-game-hack In PDF document text
    • http://www.my-travel.com.hk/upload/files/cheat-fly-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/cheat-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/robux-hack-pastebincom-raw_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-codes-for-assassin-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-hack-models-into-roblox-t-shirts_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/getrobux-now_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-exploit-2021-free_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-spins-2021_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_off00002f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7B 22020 bytes
SHA-256: dff4eb92109319a6fd8bb079ce77e5951c53319e304807aecf6c3c513793c6a3
font_01_sfnt_off00005ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF9 19244 bytes
SHA-256: be7752f57ccf685e442ef5989b530702d97392ecb413542eb336f8d1f78fb798

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