Malicious PDF — malware analysis report

Static analysis result for SHA-256 56007cc1ef8e8ed3…

MALICIOUS

PDF

44.7 KB Created: 2021-05-13 05:04:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 37c50f9f5379336c6d342f625a6aabde SHA-1: 810dcb038790c1c337c27fe12f0c4b925832a7fc SHA-256: 56007cc1ef8e8ed3ddcd8edc273e46e8e8ccf8fbb59b6e1165f1b37f9737fb75
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting 'free generator / game hack' lures. The document body and embedded URLs reinforce this theme, suggesting the primary goal is to trick users into visiting these sites, likely for malware distribution or phishing. No scripts were extracted, but the PDF structure and embedded links are strong indicators of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-play-minecraft-for-free-game-hack In PDF document text
    • http://jointworkstudio.com/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://jointworkstudio.com/images/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://jointworkstudio.com/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://jointworkstudio.com/images/robux-scam_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://jointworkstudio.com/images/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://jointworkstudio.com/images/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://jointworkstudio.com/images/can-you-host-a-minecraft-server-for-free_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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c29.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C29 24060 bytes
SHA-256: 378e826454eb018acf702e39238bc100b647d5982f8cfbb1d536b306260eac61
font_01_sfnt_off00008233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8233 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00008c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2F 18284 bytes
SHA-256: 30e565cae926cf2505d0f64cbbb860d09a66a84df24e80d913481d9233f56de2

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