Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a34313eb4218bd4…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 12:02:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d40875693336780a2ed7d5dc087ba8f3 SHA-1: 7b55a45799dfc1513a183265a1da42dc04517d13 SHA-256: 8a34313eb4218bd48c7f6cb2f55fbc9df971aa9d31c2149b2856bdbff508c95c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics suggest a lure related to game hacks and free currency, likely intended to trick users into visiting these malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/431946152/how-do-you-get-free-roblox-money-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/can-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/www-coin-master-hack_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_004_off00005270.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5270 27376 bytes
SHA-256: e9533ecd7af129835dc56225e013de821475cbfb3eeff997a0d1615d7785dd72
font_01_sfnt_off00009191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9191 19064 bytes
SHA-256: 94f9efcc29addd786a26302115b4c31227e6eded102cc07b8eb042232f1d4f5b

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