Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e253346988eab16…

MALICIOUS

PDF

35.6 KB Created: 2021-07-03 18:09:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 76e3a40feee6937dbfad9df13cd5c68b SHA-1: 109abef311504b430197a2fee378bc8c70d6ab50 SHA-256: 1e253346988eab160d0a077f28affb74e325179e4a27ebd7ba40d371fa5a614b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free game hacks' and 'robux generators'. The primary lure appears to be a scam designed to trick users into visiting potentially harmful websites. The document's content and embedded URLs strongly suggest a phishing or scamming attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-hack-no-human-verification-game-hack In PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/noob-vs-pro-vs-hacker-roblox-bloxburg-build_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-wanted-cheat_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/is-bloxburg-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/robux-come_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/10-million-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-666-hack_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-cheatsobc-for-free_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-get-free-broken-egg-in-roblox-rpg-world_GM431946152.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
font_00_sfnt_off000031ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AC 22828 bytes
SHA-256: aa21921bf53a8b86caba252c535bcacf8d46e3a51a9043508c613f91394864c3
font_01_sfnt_off000064cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CC 19504 bytes
SHA-256: eb8ce7e3da5a97c3b4f0a1013d81a421e960dbc6320d0a210e145d8bed029be0

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