Malicious PDF — malware analysis report

Static analysis result for SHA-256 e107a1e5b742e7a4…

MALICIOUS

PDF

45.0 KB Created: 2021-06-02 08:16:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8e1960e150928180de566e3111bf7a3c SHA-1: 2333aa1ffb77cc2881374bd5c5b339b694f3c302 SHA-256: e107a1e5b742e7a405c23f2795be398a904e765901b5e4537e2fbca1021c7609
160 Risk Score

Malware Insights

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

The PDF contains multiple links to redirectors and lures users with promises of free in-game currency, such as Robux. The heuristic PDF_GAME_HACK_REDIRECT_LURE specifically identifies this as a lure for game hacks. The embedded URL leads to a known malicious redirector, indicating a high likelihood of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-2021-july-game-hack In PDF document text
    • https://alarmed.pl/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/roblox-hax_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • https://alarmed.pl/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://alarmed.pl/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://alarmed.pl/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://alarmed.pl/images/coins-master-hack_GM406889139.pdfIn PDF document text
    • https://alarmed.pl/images/classic-minecraft-net-hacks_GM479516143.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_off00004f7c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F7C 26336 bytes
SHA-256: 4ca03e6cd122ce310bc3ed9db783b0c4d2da85e8c5ca64901909c0363ac68074
font_01_sfnt_off00008a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9D 19104 bytes
SHA-256: d05ac2e28e90ad641f1bef5d59f23aafc8eaab70b42c2e776f02c68ed8fb2976

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