Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03ce82d947a5ca5…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 23:55:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a010cedb2230d65b54b4bae346a02cab SHA-1: fc82879dbfde949a75c925475989b34d1b41d1a5 SHA-256: d03ce82d947a5ca555b6f82099f4bb1dac8687fd32e129e09277a3d884fad3cb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of game hacks and cheats to trick users into clicking malicious links. The primary link redirects to a known malicious infrastructure, which in turn hosts multiple other malicious PDF files. The document body contains obfuscated text and URLs, suggesting an attempt to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-online-pc-game-hack In PDF document text
    • http://librarystkippgribl.com/repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/hack-vetement-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/casper-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-get-free-robux-2021-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-do-you-hack-roblox-account_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/link-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-but_GM431946152.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_002_off00003077.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3077 23024 bytes
SHA-256: 5bab253a1e8a93d5248ad9a59e7d4abfc2f9c023e4f16151572316581ba23a04
font_01_sfnt_off0000643b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643B 18232 bytes
SHA-256: 2e126d135fd472f17e04e2c2670c366e67c2359c8a974fc9d6678d50609a09dc

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