Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcd08cf3e1efb74…

MALICIOUS

PDF

35.6 KB Created: 2021-06-23 01:31:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7775cc52542aef43ceae98f9c19da69b SHA-1: 0d34b92b4c77398185251629c5ef5888b4b3153b SHA-256: 8dcd08cf3e1efb74a3193f3b71f4984406ff01c563a3827845bfb7d01e0df24e
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and websites offering game hacks and cheats, such as 'roblox-jailbreak-hack-download-easy-game-hack'. These links are designed to lure users into downloading potentially malicious files or visiting further compromised sites. The ML classifier also strongly indicated maliciousness.

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/roblox-jailbreak-hack-download-easy-game-hack In PDF document text
    • http://inextpresident.com/images/comment-avoir-des-robux-gratuit-sur-pc-hack_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://inextpresident.com/images/roblox-hack-promo-codes_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/roblox-free-robux-hack-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/free-robux-web-page_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/game-roblox-online-free_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/roblox-secret-form-hack_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/pokemon-go-free-promo-codes-march-2021_GM1094591345.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/how-to-get-games-that-cost-money-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/roblox-full-version-free-download_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/minecraft-server-hacks_GM479516143.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_002_off00002f93.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F93 23772 bytes
SHA-256: 19c94043598b71088e2d1d730082d82f66a31b78bea82b2a9a2635d1c8cb4427
font_01_sfnt_off00006459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6459 19628 bytes
SHA-256: 791f0cadb37ccc5d6bb3d1e79ec094fb6bffc63c67a22e9bdc741f0c3d163b79

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