Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c42b78db1661fd4…

MALICIOUS

PDF

34.0 KB Created: 2021-06-25 10:26:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c2a4653ec6ceb5493d82f8517f2c89b9 SHA-1: 1d5bbd065a622c0bbc0ed6c7e2bd27a29be31eba SHA-256: 0c42b78db1661fd4f82b83ba03d53bc2f24639d8b99129774a8abb2589514c08
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs are associated with known redirector services. The document body text and embedded URLs suggest a lure for users seeking in-game advantages, likely leading to further malware downloads 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.co/app/431946152/script-cheat-for-roblox-game-hack In PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-web-store_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-much-is-uc-pubg_GM1330123889.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-robux-august-2021-27th_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/mcpe-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-body-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/passwords-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECB 21976 bytes
SHA-256: 8917d17054b69558eccbe019b0d51862da4377d02c6a1c6d7e8bd3626682858e
font_01_sfnt_off00005f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F97 19216 bytes
SHA-256: 9ddede084dacd2c7b4db95a9cac53c5730686d35bdf7570a4037dec0acf073d8

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