Malicious PDF — malware analysis report

Static analysis result for SHA-256 6294e1d517f34d55…

MALICIOUS

PDF

43.0 KB Created: 2021-05-16 15:10:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 251c4dc3fa752392500a8efc2f81c89d SHA-1: c3d4b6a5246e42006094271af1b0baba30d29cc3 SHA-256: 6294e1d517f34d556fa29fc4a7690f9a4386349e3b3cf3b96794f09ffd493dfb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body, though partially corrupted, contains references to these lures and additional URLs hosted on androidthai.in.th, suggesting a phishing or scam campaign. No scripts were extracted, but the presence of malicious redirectors and the nature of the lures strongly indicate a social engineering attack.

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/479516143/free-minecraft-coloring-pages-game-hack In PDF document text
    • http://androidthai.in.th/images/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://androidthai.in.th/images/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://androidthai.in.th/images/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://androidthai.in.th/images/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://androidthai.in.th/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://androidthai.in.th/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://androidthai.in.th/images/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://androidthai.in.th/images/coin-master-fan-page-free-spins_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_off00004aea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AEA 25864 bytes
SHA-256: c82e4829769f9bedecee6a11a01f42f475caabb6a0301643b1d5d1cf2851a556
font_01_sfnt_off00008648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8648 18224 bytes
SHA-256: 6e343a052bd34aead68fa90857bbbafbb2ebf9a3dc2705f241561e157218897d

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