Malicious PDF — malware analysis report

Static analysis result for SHA-256 b079b1d45f0cbbc5…

MALICIOUS

PDF

35.9 KB Created: 2021-07-03 22:20:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8e00e328a9b5f778ee8a2c955c196e66 SHA-1: a78aadc5719adfa470e1b101c4306bc18e74e93b SHA-256: b079b1d45f0cbbc5f0a1c3873735adb5da6951a5123b4e77e074bda634b5634b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising free game currency and hacks for popular games like Roblox and Coin Master. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms these links point to known malicious infrastructure. The document's primary purpose appears to be luring users to these sites, which likely host further malicious content or phishing attempts.

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/431946152/roblox-free-robux-may-2021-game-hack In PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-how-to-get-free-clothes-without-bc_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-2021-robux-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-100-robux-on-roblox-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/dragon-ball-z-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-stolen-roblox-games-download_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/rape-simulator_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-cheats-invincibility_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-muscle-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-robux-hack-download-for-andriod_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-just-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-free-robux-private-message_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-roblox-easy-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.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_off00003286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3286 22832 bytes
SHA-256: 8b6c198753d11ebda81bbfe95021d9e14d2af7b3dd5da448bc570b7e95c7cdef
font_01_sfnt_off000065bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BC 19568 bytes
SHA-256: 14f8082aab03ef4a0190a9e2efeb857bc762ca85af58a20ad1b94dbac72c6965

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