Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a96dd00b8c4a070…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 23:52:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5adff73738784252d0a1bdff2e56027b SHA-1: 6ba84e01e9ad425c332cf6451d79e260ef230a5c SHA-256: 0a96dd00b8c4a07083fc102014c70f58ebe5e77cc169eb5b2ba6ea29ba59d1cf
220 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The document body, though partially corrupted, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of a 'secret recovery' lure heuristic further indicates a phishing or credential harvesting attempt.

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/coin-master-haktuts-game-hack In PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/rbx-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/robux-download_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
stream_004_off00005421.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5421 29668 bytes
SHA-256: a19727bde75053378d2bee311bfe2eb8fb282429c724fec419bba88afb696c56
font_01_sfnt_off00009251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9251 17856 bytes
SHA-256: 75071ac62cf1f8e63970abc485880b2afc9ed082c679e94b51aa601dbd55dd98

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