Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f6f6887ece4818…

MALICIOUS

PDF

45.5 KB Created: 2021-05-19 07:34:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7def77f348cb29025c14046c9df76ef7 SHA-1: 46bad27fc4f1be2124c22d3196145aad165c2ce1 SHA-256: f6f6f6887ece481886558e50d7072241c400454d3fdc68d84e3cee29eddcb4bf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The primary URL, https://netcdn.xyz/app/431946152/can-you-get-robux-for-free-game-hack, is directly associated with a critical heuristic firing for malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/can-you-get-robux-for-free-game-hack In PDF document text
    • http://halle-wasserball.de/images/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://halle-wasserball.de/images/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://halle-wasserball.de/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://halle-wasserball.de/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://halle-wasserball.de/images/free-spins-coin-master-ios-links_GM406889139.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
stream_003_off000048b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B5 24828 bytes
SHA-256: 41b6b52925b8dd488850d52e95c872433aeab70e41de4483fe013e3b4463f155
font_01_sfnt_off000081f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F4 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9B 18508 bytes
SHA-256: c061b59ab901ec7c7e5d17bc5fec7ace191fd36e08e64edc0ca642be8bf86a0e

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