Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a982bc5b700a83…

MALICIOUS

PDF

48.2 KB Created: 2021-05-11 15:06:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 08fc9e1432e6e81def4ef98f109d8808 SHA-1: 0a9ebd9a254c18b64152b51e1b8c09605f0958a4 SHA-256: b2a982bc5b700a83ad53a3d0c7219d7cb6c4339ab663d5e09e0b6ea3d3308026
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating a malicious redirector lure, specifically targeting users with promises of game hacks. The primary embedded URL, https://netcdn.xyz/app/431946152/mobihack-roblox-hack-game-hack, is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure for free game-related content, aligning with a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

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/431946152/mobihack-roblox-hack-game-hack In PDF document text
    • https://wandpiraten.de/images/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/how-to-win-robux_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/gain-robux_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/robux-premium_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46F8 25516 bytes
SHA-256: 861eb90f5c1faaaa0db8ae01f6205dbfba79d0e965f6225d9280f28e68770dd2
font_01_sfnt_off0000825f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825F 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFB 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off000098a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A3 18664 bytes
SHA-256: d288d15c1916950328fb714ac92034fecf93cb41bb8e66b8d5651844f64bc7ec

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