Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a829cc87a4b68e…

MALICIOUS

PDF

41.6 KB Created: 2021-05-14 18:00:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e24d5ed86cb6fa7e3533224742cfa0ae SHA-1: 3d7843ac10067515f13c2be0996c7df30517cd0d SHA-256: a6a829cc87a4b68ecbf5cf344aac3b5d2d25cb1c0491ee03d8dee6d8c65d7577
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that are identified as malicious redirectors, specifically luring users with game hack content. The embedded URLs, such as 'https://netcdn.xyz/app/479516143/minecraft-free-android-game-hack', are designed to lead users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or social engineering attack aimed at redirecting users to malicious infrastructure.

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/479516143/minecraft-free-android-game-hack In PDF document text
    • https://reggieslockandkey.com/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/robux-free-online_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/robux-without-verification_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In 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_off00004886.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4886 24820 bytes
SHA-256: 3f83c21fb4d25a48157f5fd96ea8523ba71b0212b7e7fc820128e712f5cb5383
font_01_sfnt_off00008177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8177 17884 bytes
SHA-256: 82c3baf37781722f94369c3593b69e30ff14556e6fd52427afe75c94c9d4ce60

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