Malicious PDF — malware analysis report

Static analysis result for SHA-256 739a592e2fdb12cc…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 06:21:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 305b8cfd7e0aeca49e10f09c96872f39 SHA-1: ed18aa9ce564cd62e7041212392bed1c64d6b60a SHA-256: 739a592e2fdb12cc339f1495f20e4d9585b205a8d9a9fa7f939a2ecc8907d8b4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, leading to a "game hack" lure. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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 https://netcdn.online/app/406889139/coin-master-rewards-game-hack In PDF document text
    • http://perpus.wdh.ac.id/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/pokemon-go-free-storage-upgrade_GM1094591345.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-daily_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E46 24560 bytes
SHA-256: 7c1a36dcdfe5ad0fc5d25f0d1a11172b07a3c48ceb138f896152201c76eead3a
font_01_sfnt_off0000865e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865E 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9010 17884 bytes
SHA-256: acbd2960432ed6aaee9cffad063da1b3d43b5b4e200ce15de4e80cb136e5b59b

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