Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9f8aee670a4999…

MALICIOUS

PDF

42.4 KB Created: 2021-05-13 07:30:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2ce410c31a90ca5a533143bd05a54818 SHA-1: 5d8873c61696111b33e0907c03a52f9f1d5b579e SHA-256: 9b9f8aee670a4999323efb2a846adb73c7108d491d84b9b8efb25d2ea3bb1f32
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to trick users into visiting scam websites, specifically promoting game hacks and currency generators. The presence of a malicious redirector URL and links to IP addresses hosting further PDF lures indicates a phishing or scam campaign. While no scripts were explicitly extracted, the document structure and embedded links strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-hack-mod-game-hack In PDF document text
    • http://110.232.83.89/slimsppks/repository/get-more-robux_GM431946152.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a0a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0A 25744 bytes
SHA-256: 98935072c662204d947914390367b0a50dfc065344292f4acf735fec46f74d84
font_01_sfnt_off00008444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8444 18056 bytes
SHA-256: c98163390533840513273057c02ab8b0002c23ddfc36b9b9583c7d176bc18763

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