Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c9acf32311e8a3…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 00:06:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d831d6f1848055783b0305c334d35a79 SHA-1: 2b6164757639889da72ae409b41754b24e6b6076 SHA-256: 45c9acf32311e8a34e73c4a2bb50c3e2f39f84a5869f31cfcf570e17296b5c13
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of game hacks and generators to trick users into clicking malicious links. The primary link, http://netcdn.tw/app/406889139/coin-master-time-hack-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

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/406889139/coin-master-time-hack-game-hack In PDF document text
    • http://perpus.wdh.ac.id/repository/hack-tower-battles-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-cheat-infinite-jump_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-dinosaur-simulator-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/which-pokemon-go-free-server_GM1094591345.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-cheats-for-phantom-forces_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-promodes-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/forum-hack-roblox-fr_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-use-cheat-engine-on-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-roblox-on-phone-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-roblox-money-maker_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/rorewards-com-earn-free-robux-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_off0000309d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309D 22460 bytes
SHA-256: 135b2f67b0a90bcf7086e5b4b89d34086cb179ba33f9dc34d14fde1a226a926e
font_01_sfnt_off0000628b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628B 18264 bytes
SHA-256: a35f03033499eda65d45903a57c9add3aa2902d7cbd0f8850fdac8c8cf98d449

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