Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a232562d7bc265…

MALICIOUS

PDF

42.9 KB Created: 2021-05-10 20:00:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 428f251796b2ad2944980154fece8a2e SHA-1: cd8001edd5585cb00f61be9412b71d7e18c490b5 SHA-256: 67a232562d7bc26572dec4e5310672fa548ea84c1479d151ef8ddf044b627d3f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to websites offering "free Robux" or "game hacks," which is a common lure for malicious content. The heuristic firings indicate that these links point to known malicious redirector infrastructure. Although no scripts were explicitly extracted, the nature of the lures and the embedded URLs suggest an attempt to drive users to potentially harmful sites, likely for credential harvesting or further malware delivery.

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/431946152/how-to-get-free-robux-for-real-game-hack In PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/www-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://krnl.rocksIn 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
font_00_sfnt_off00004ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD0 25196 bytes
SHA-256: 0d695cb2a21a3f11ca38bd17790cf47d6c71fbd898ca4cde3e5d78314b55a755
font_01_sfnt_off00008477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8477 18584 bytes
SHA-256: 4c8fb6f4ba3d8fd1a53aecf8e038afdea7cc6760123f6d2281f23f521b1068d8

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