Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c2c90e7b6e33ca…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 09:04:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b1dfc26f864b93bb4302313b97d4e1d5 SHA-1: 1144c2399f8440690d0373e07ff4112143771cde SHA-256: 61c2c90e7b6e33caec0fa58b9ad489c728d491df6842e1d1bda415fb0661b1ac
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free game hacks' and redeem codes. The ML classifier strongly flagged this PDF as malicious, and the embedded links are associated with known redirector patterns. No scripts were extracted, but the document's structure and embedded URLs indicate a lure to a potentially malicious download or exploit site.

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/479516143/minecraft-redeem-code-free-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-exploit-2021-hack_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-roblox-jailbreak-account_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/hacks-for-assassin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-hack-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/2021-free-robux-hacks-without-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-scams-reddit_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/copy-and-paste-free-robux-items_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/help-my-roblox-account-got-hacked-and-dosent-have-security_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-roblox-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-pants-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-hack-clothes_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/playesp-hack-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-hack-any-roblox-game_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/adopt-me-roblox-play-for-free_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/script-hack-for-roblox_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_off000030b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B6 21596 bytes
SHA-256: 703ca45b1a10ae99509681e732e3f7a7cff401715d1c751ee6d1909ad55d830b
font_01_sfnt_off00006017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6017 18432 bytes
SHA-256: e00542d8802f7f3094baa1a46dd06b8460a806b53ddd700a8fbe3f626e4c3c25

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