Malicious PDF — malware analysis report

Static analysis result for SHA-256 122260e21770fb70…

MALICIOUS

PDF

45.2 KB Created: 2021-05-11 23:04:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6308eebbdd0f25d9166b1aa35e15dd61 SHA-1: e41f3dce58703d0b7714329b0c25c0393e12d98a SHA-256: 122260e21770fb7006a0ee2fa2a7927de9cb17096cd240d4e6727caf92a0d803
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, under the guise of offering free game currency or hacks. The ML classifier strongly indicated maliciousness, and the presence of redirector links suggests an attempt to lead the user to a malicious site or download. No scripts were extracted from this sample.

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 https://netcdn.xyz/app/406889139/free-spins-and-coins-coin-master-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-a-game_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-pet-snacks-in-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
stream_003_off00004e02.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E02 30088 bytes
SHA-256: 88f30f5aec8f9e8fb0f26c13e28fdc8a43e8f490bce2c6be9791f868f7c0d426
font_01_sfnt_off00008bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD7 19212 bytes
SHA-256: 5d49580604d04055c0e9016646630a1b2e6aa858e99eb4572763fa6af66b0c31

Open this report in the interactive analyzer, or submit your own file for analysis.