Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc54315023febbf3…

MALICIOUS

PDF

45.9 KB Created: 2021-05-17 22:57:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 001f47c85994015fa4f24f3372cb5724 SHA-1: ab4ae326edb79732777bb69ffc47a55946ab99bc SHA-256: dc54315023febbf337f1006f6358c29c4409b101f908e139d48aef0cf74cd145
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically designed to lure users with promises of free game spins and hacks. The document body and embedded URLs reinforce this theme, indicating a phishing or scam attempt. The primary malicious action observed is the redirection to external, untrusted infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-free-spins-link-deutsch-ios-game-hack In PDF document text
    • http://linde-erbach.de/images/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/www-rubux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://linde-erbach.de/images/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://linde-erbach.de/images/minecraft-windows-10-hacks_GM479516143.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_off00004b8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B8A 25760 bytes
SHA-256: 9efc8115549a6d7bfb5360100e87d80eaad17f4978673cc9ab26f66805d657b5
font_01_sfnt_off00008659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8659 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9044 18528 bytes
SHA-256: 7175abba28d978b4edd32102cbe55dc5ea5b56fd80137f2bac6bd07f05acb141

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