Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed652dab9c85b7ba…

MALICIOUS

PDF

49.0 KB Created: 2021-05-12 01:35:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6370426a3d045510dfa2edff1b0379ca SHA-1: 3bd8671a9b30ae367e3cd442d748c0e321f9f0e7 SHA-256: ed652dab9c85b7bae4583168d7df1f449a3a727d6c224e16e7efcd881a50a280
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links that redirect to malicious infrastructure, specifically promoting "free generator / game hack" lures. The embedded URLs and the heuristic firings strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded links are indicative of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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/get-me-robux-for-free-game-hack In PDF document text
    • http://stroygrad-spb.com/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://stroygrad-spb.com/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://stroygrad-spb.com/images/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://stroygrad-spb.com/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://stroygrad-spb.com/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://stroygrad-spb.com/images/make-free-robux_GM431946152.pdfIn PDF document text
    • http://stroygrad-spb.com/images/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://stroygrad-spb.com/images/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://stroygrad-spb.com/images/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://stroygrad-spb.com/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://stroygrad-spb.com/images/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://stroygrad-spb.com/images/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://stroygrad-spb.com/images/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://stroygrad-spb.com/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://stroygrad-spb.com/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://stroygrad-spb.com/images/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • http://stroygrad-spb.com/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://stroygrad-spb.com/images/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://stroygrad-spb.com/images/earn-robux_GM431946152.pdfIn PDF document text
    • http://stroygrad-spb.com/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000490d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x490D 26612 bytes
SHA-256: d900851c36888d756d605e5e169dcf46793cb5e6c12c58bb266608cc7328f24c
font_01_sfnt_off000082f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F7 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA3 6636 bytes
SHA-256: 62075f0fe13502d46afb6e55e83d440c29ef4988399537df1f86e7653ce3b744
font_03_sfnt_off00009cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB0 18312 bytes
SHA-256: 932e048767bb22e6267a54c454926b1d6572868c8ffb63cd4dd0c91a684054b1

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