Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f5ac7857148835…

MALICIOUS

PDF

37.8 KB Created: 2021-07-04 19:44:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6d3f51906cfa929c0881368694398579 SHA-1: a116ad112e74d8e80ede9e75bf5e97aec53632a5 SHA-256: 97f5ac7857148835d0fb8c9f68a597bfc5f37fa73ad9ec1480de4f6de4d2bf7f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector for game hacks. The document body and extracted URLs strongly suggest a lure for users seeking free game currency or cheats, which is a common social engineering tactic. The presence of embedded URLs and the nature of the lure indicate a likely attempt to direct users to malicious infrastructure, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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/how-do-you-get-free-robux-on-roblox-game-hack In PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/adonis-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-pc-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-weight-lifting-simulator-3-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-roblox-account-to-delete-them_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-fashion-frenzy-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/good-roblox-games-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-hack-free-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spin-link-coin-master-app_GM406889139.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_off00003be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BE4 22468 bytes
SHA-256: 113e2e8f64779fe088bd183df52b2f7dd1c9d45d493829d55dbffa052136e552
font_01_sfnt_off00006dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD4 19388 bytes
SHA-256: bfe8901ed3b01612589fbf5cddaaa2e97b8ca06efec900f58c792d736f26eaab

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