Malicious PDF — malware analysis report

Static analysis result for SHA-256 88268281957d95e3…

MALICIOUS

PDF

41.6 KB Created: 2021-05-15 14:36:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a86b1c1448fcadee9fcca1b346e4292c SHA-1: 381f24684b26174997883388788a9aaeb74d65a8 SHA-256: 88268281957d95e345732fdd5ccd60645a4eb511de51c42240aea786d6f6192e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, disguised as free game hacks or generators. The document body and embedded URLs strongly suggest a phishing or scam attempt to lure users to malicious sites. While no scripts were explicitly extracted, the nature of the links and the lure indicate a high likelihood of further malicious activity, such as downloading additional payloads.

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/free-robux-promo-codes-2021-game-hack In PDF document text
    • http://razredna-nastava.net/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/give-me-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-source_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-23-march-2021_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_003_off000044c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x44C9 25728 bytes
SHA-256: f3068dd4bc4f9c56f32c9704ca1df98d527c11028c232b70749931cd0b8bd2e4
font_01_sfnt_off00007e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E28 19004 bytes
SHA-256: 2ae4233163b81a205a597c97f5f9bceef85a21038461a0399da8d1b6d9f39b0a

Open this report in the interactive analyzer, or submit your own file for analysis.