Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f8278563a14016a…

MALICIOUS

PDF

43.5 KB Created: 2021-05-13 01:35:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0a71bdf2f54ed1a6b20ea11b309a039b SHA-1: bd256fa9af12e17ffec7aacd158a462204c379f2 SHA-256: 1f8278563a14016a73d9afded75b537bec3bcf7d7e5c383563fff002e8aacb33
220 Risk Score

Malware Insights

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

This PDF document is designed to lure users into clicking links that lead to malicious redirectors and extensive link farms, masquerading as game hacks and generators. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-hack-pro-gamers-game-hack, which is part of a larger network of links pointing to various game-related cheat sites. The document's structure and content strongly suggest an attempt to exploit user interest in free in-game items or cheats to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-pro-gamers-game-hack In PDF document text
    • http://www.cuniv-naama.dz/images/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.cuniv-naama.dz/images/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.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
stream_003_off00004a89.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A89 27816 bytes
SHA-256: e8d3cfea26dffa3e1e85348ee8bd807d591fbf1c38f161375cf13c6011f12d7f
font_01_sfnt_off00008861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8861 18132 bytes
SHA-256: 7c3ba000fcc9e82367a9cf09e7428e48624a936725f215f3086fe1b405a0b7f2

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