Malicious PDF — malware analysis report

Static analysis result for SHA-256 a305f19454cc99ab…

MALICIOUS

PDF

43.2 KB Created: 2021-05-14 14:01:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6e7ee323930cb577f248ecc71f64331e SHA-1: 3f818a63ef075eb2b25376827a834d2dc2396a5e SHA-256: a305f19454cc99abf174420ca418cbaf0de80991e87fb00eb220dcabf17e897e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The heuristic findings indicate that these links are designed to lure users to potentially harmful websites. While no scripts were directly extracted, the nature of the links and the ML classification strongly suggest a malicious intent to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-attack-block-hack-game-hack In PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-minecraft-java-code_GM479516143.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_off00004d96.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D96 25416 bytes
SHA-256: 7a90af756567d30ea446d238be41c3ba8d6d2ca549879b9313d7ee5c76cdb296
font_01_sfnt_off0000875b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875B 18008 bytes
SHA-256: 0ca0a7b3c48285d5504a250c0c9352f2a5009124704ab461b8ccbe1fad4bf069

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