Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd8ab17e33fb28f…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 12:31:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d1e40110cfbce4bb0d85139bd1d720d5 SHA-1: d2648c6dc981e854793ea3317df8890622579f53 SHA-256: 5fd8ab17e33fb28fd738928d8e17a363f362110ab57158483bd7e3469fe1cab4
220 Risk Score

Malware Insights

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

This PDF document employs a lure related to 'game hacks' and 'free generators' to trick users into clicking malicious links. The document contains multiple embedded URLs, including one pointing to known malicious redirector infrastructure. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may also attempt to solicit sensitive information like private keys or passwords.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.online/app/406889139/how-to-hack-coin-master-with-lucky-patcher-game-hack In PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-com_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_off0000537d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x537D 25016 bytes
SHA-256: 9222ecb8d5eb3feb129130f969e9a84341a523869eb97045ce0eea5ad73a1f34
font_01_sfnt_off00008d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0D 18720 bytes
SHA-256: 34d75f097297ed1589fbb05f13100ff3c6eb1e0ee8c8ab2f5ab039955987b94a

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