Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ab339e0ef004c4…

MALICIOUS

PDF

41.9 KB Created: 2021-05-12 15:29:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e4b58a6ddabc70bca2c1b08262943017 SHA-1: a91cc9e29412b06b0242e5f21ffe496abd439050 SHA-256: 96ab339e0ef004c4d4fcab2e7776db434ebd33172ccd8ab987c06bac840b5a5d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary redirect URL is https://netcdn.xyz/app/406889139/hack-coin-master-apk-game-hack, which is associated with a high number of malicious redirector links. The document body and heuristics indicate a lure for users to download or access potentially unwanted or malicious content.

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/hack-coin-master-apk-game-hack In PDF document text
    • http://www.arichuna.com/images/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://www.arichuna.com/images/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/roblox-person_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-robux-co_GM431946152.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_off000048c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C2 25240 bytes
SHA-256: 764d548bb80904769a195fda8a66924601f957f774ec2e5cd44cc257a67b3530
font_01_sfnt_off0000824f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824F 17892 bytes
SHA-256: 9c4dada9bbcb376b19026f9d82cd29b1bcb88de2b1ea71a23b293af0df71213a

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