Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2261cd682680ad8…

MALICIOUS

PDF

42.7 KB Created: 2021-05-15 15:39:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: dcb1d0b2cfbb9ebbc4cf7c2a0a98e419 SHA-1: 6ca20e284efa4f4025b641801116e27099db4f24 SHA-256: d2261cd682680ad84d4a6fa39eb0d50e7b01eb4bcd2ea880dadab050c218bcc8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors disguised as free game hacks and generators. The primary malicious link identified is https://netcdn.xyz/app/479516143/how-to-make-a-minecraft-server-for-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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/how-to-make-a-minecraft-server-for-free-game-hack In PDF document text
    • http://www.backlineservice.nl/images/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://www.backlineservice.nl/images/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/www-robux-com_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://www.backlineservice.nl/images/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://www.backlineservice.nl/images/coin-master-hack-2021-android-apk_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_off00004bca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BCA 25696 bytes
SHA-256: b74bfd58ca69f4ee3a08aa9a5a8c8f4e569c4da36c6e8c01413eceacad3f2710
font_01_sfnt_off00008530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8530 18156 bytes
SHA-256: 7ebd6cc6f7d73451d43dfe99dc02d56d86c4e3c51693199467050b16fbe82799

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