Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad22eb423ad5bae3…

MALICIOUS

PDF

35.8 KB Created: 2021-07-01 06:34:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6c21831b316ef0e35173a73e8c923ba8 SHA-1: 692453a1c80600617d80986e3e1327f1e891e6f5 SHA-256: ad22eb423ad5bae35485ed484aeea727d980dec3ab0b72b2e5cdebf249c0c3eb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure, 'How To Get Free Robux On Roblox On Ipod', directs users to a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or redirection attack, likely intended to deliver further malware or lead users to scam pages.

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.co/app/431946152/how-to-get-free-robux-on-roblox-on-ipod-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-cheat-engine-2021-may_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-salvage-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-robux-simulator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-dorm-life-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-make-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/100-working-robux-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-in-silver-in-treelands-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-exploit-roblox-auto-updating_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-avatar-drawing_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-easy-2021_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_off0000328d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328D 22856 bytes
SHA-256: eb038bca24fcb10fa8b80f68bbbfb05d3494d5fb27bbeee83f126086a121fa49
font_01_sfnt_off000065d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D0 19408 bytes
SHA-256: 6d73a540d57e335e107be5d06bc82258418b03541fcafec4093d1fdf5cb0eaba

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