Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfdbdc9ca5f2bee6…

MALICIOUS

PDF

42.5 KB Created: 2021-05-11 22:41:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 376fc8cf469a563cf5b23bb4cee33b35 SHA-1: 83dd7f9be4663b9b8ea19517acb34900f21a386e SHA-256: dfdbdc9ca5f2bee6287b3052226de5c41948d6d1d6d0616aa766dd6425653de0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains and potentially malicious content, specifically targeting users interested in game hacks and free currency. The heuristic firings indicate that the PDF is designed to redirect users to external sites, likely for malware distribution or phishing. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-cheat-codes-game-hack In PDF document text
    • http://make-up-stettler.ch/images/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://make-up-stettler.ch/images/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://make-up-stettler.ch/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://make-up-stettler.ch/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://make-up-stettler.ch/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://make-up-stettler.ch/images/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://make-up-stettler.ch/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://make-up-stettler.ch/images/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://make-up-stettler.ch/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://make-up-stettler.ch/images/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://make-up-stettler.ch/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://make-up-stettler.ch/images/coin-master-hack-version-2021-download_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004982.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4982 24896 bytes
SHA-256: 7840334abd6acefba514ac5604e9f0b02e810d335bf4105f4991a9e88b939d42
font_01_sfnt_off000082f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F9 18456 bytes
SHA-256: 79411d0a2da13a8acff975e82d989f343be59a98b2b19e39ed5663a4026c58d6

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