Malicious PDF — malware analysis report

Static analysis result for SHA-256 94af830e694c30e4…

MALICIOUS

PDF

48.5 KB Created: 2021-06-02 10:10:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 502001a0082a3855bd0c3ff2359bf35d SHA-1: a2bba4b813285696345b2fb08feecb878cf5a0bd SHA-256: 94af830e694c30e44a2d47f6b8987e726d74437c747cc2e1909770b804af3793
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and other PDFs hosted on suspicious domains, masquerading as game hacks and free item generators. The document body and embedded links strongly suggest a lure to trick users into visiting malicious sites, likely for further exploitation or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/edit-roblox-game-code-cheat-engine-game-hack In PDF document text
    • https://schulzpressetext.de/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f70.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F70 26444 bytes
SHA-256: 7147f42267a4597273e29262464735d25ebbabb9da3c66794378928287c87f06
font_01_sfnt_off00008b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B50 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9862 19124 bytes
SHA-256: d1b7a636893fe30f3aa887f3fde7e62e62cfe36e4e82b76a7f7e0dfc18951151

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