Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d16b44eab8786a…

MALICIOUS

PDF

41.7 KB Created: 2021-05-17 22:07:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e7782a7632a5d92113f26977023a0136 SHA-1: 6cfba8e45878628cd5ab746bb65dd1e6ac0933b2 SHA-256: 89d16b44eab8786a2563494a5d23faab9f6403dec8767db8b0dff79e2c209bd0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this by referencing 'Coin Master Hack App' and linking to similar-looking PDF files. The ML classifier also flagged this PDF with high confidence, indicating malicious intent.

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/coin-master-hack-app-game-hack In PDF document text
    • http://dopheide.be/images/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • http://dopheide.be/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/get-robux-today_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dopheide.be/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://dopheide.be/images/roblox-jailbreak-hack-download_GM431946152.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_off00004960.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4960 24656 bytes
SHA-256: 06b09385de8f34c005e57364f75bd14c9ceffbe26690087eadd2a0326a44f1c5
font_01_sfnt_off000081ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AE 17892 bytes
SHA-256: f939fda97690d6a809d743b342add8ec97984f5e978608423f32dd39679c4d64

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