Malicious PDF — malware analysis report

Static analysis result for SHA-256 31315e4b74885c5d…

MALICIOUS

PDF

47.4 KB Created: 2021-05-13 07:13:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 35f7ec911c03cd7f915398daa4ba27e2 SHA-1: 7f11b0f9c2ffdfdfe4b133acd471a8887b973e98 SHA-256: 31315e4b74885c5d0b098a258a03f983f6c13acb647fe5241a348556bd5702a1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and generators. The embedded URL `https://netcdn.xyz/app/431946152/roblox-generator-no-verification-game-hack` is flagged as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to potentially harmful content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/roblox-generator-no-verification-game-hack In PDF document text
    • http://halle-wasserball.de/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://halle-wasserball.de/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AAB 25556 bytes
SHA-256: 18411a18308f53d81b82cba71a04ad34b085c66cc8d702b5b827b6329a0ecb2d
font_01_sfnt_off00008422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8422 7604 bytes
SHA-256: b4393b16e2c096a269897d1c45a543fc9365713fd2329df9b91235200715c508
font_02_sfnt_off00009690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9690 18372 bytes
SHA-256: 9d8eb5f141d4b1ad2720853a8d1046494e15544c75f06eeb85f368c8fad4d986

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