Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3fdaf56a1c4ab20…

MALICIOUS

PDF

41.1 KB Created: 2021-05-17 20:28:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 99bf53d44b3a8e4f2604b8c8e161a064 SHA-1: 3972f23834fb152b4243b9c0fed2d83e30fe0a22 SHA-256: c3fdaf56a1c4ab20dd2ececa723cecb141c0415fd48e7e1299541b79773bf910
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generator / game hack' lures. The document body, though partially corrupted, contains similar URLs and text suggesting a scam. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-coin-master-spins-no-human-verification-game-hack In PDF document text
    • https://elite-house.su/images/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • https://elite-house.su/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://elite-house.su/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://elite-house.su/images/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://elite-house.su/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://elite-house.su/images/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elite-house.su/images/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • https://elite-house.su/images/coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://elite-house.su/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elite-house.su/images/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elite-house.su/images/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://elite-house.su/images/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://elite-house.su/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://elite-house.su/images/cpbildco-robux_GM431946152.pdfIn PDF document text
    • https://elite-house.su/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://elite-house.su/images/roblox-re_GM431946152.pdfIn PDF document text
    • https://elite-house.su/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elite-house.su/images/coinmasterfree_GM406889139.pdfIn PDF document text
    • https://elite-house.su/images/minecraft-free-android_GM479516143.pdfIn PDF document text
    • https://elite-house.su/images/coin-master-hack-mod-game-download_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004908.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4908 23452 bytes
SHA-256: 9776f46fd7fd3c4bb453fb3a6878a9427bf0ccfa89a7fa4085a54d18a8b344b3
font_01_sfnt_off00007df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF4 18420 bytes
SHA-256: 6292f7fd9c783a708a29fdad24b2019f18fef79b6cfcf8f7eb350847db107d60

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