Malicious PDF — malware analysis report

Static analysis result for SHA-256 945c41b59fbf54c5…

MALICIOUS

PDF

45.1 KB Created: 2021-05-12 05:59:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1dbec8dc33fc9c1c1f94761cdc976248 SHA-1: 515ccfb48ee072ba0d66464ea74cc4ee2b1d9cf3 SHA-256: 945c41b59fbf54c5e3ab62a13ad1063e1697eeb509e4698e92191972a6a63db4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free generators'. The document body, though partially corrupted, contains text related to 'Coin Master Hack Reddit' and a URL that aligns with the heuristic findings. The presence of multiple malicious links strongly suggests a phishing or scamming attempt, likely using a spearphishing attachment as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/coin-master-hack-reddit-game-hack In PDF document text
    • http://dennemaat.nl/images/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://dennemaat.nl/images/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://dennemaat.nl/images/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://dennemaat.nl/images/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://dennemaat.nl/images/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/how-to-get-free-clothes-on-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
stream_003_off00004a55.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A55 25692 bytes
SHA-256: 0c5057ff37117df51592718d362dfe0836df93498fb3bbbcd58ae653c617a619
font_01_sfnt_off00008522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8522 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED4 17888 bytes
SHA-256: 63a6a5d9916b9ee5af7207625cec6907b74dd50493b17e0c9eae8777c3cfd91e

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