Malicious PDF — malware analysis report

Static analysis result for SHA-256 a453398c9d20f100…

MALICIOUS

PDF

36.9 KB Created: 2021-05-20 17:58:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 240d71e89bc283d29fc776cd447aa1b9 SHA-1: a41c989f53f4e17d26fede24368754c672601b1c SHA-256: a453398c9d20f100babc959c1550006b440908c2845a089f5ce82558d1ec8ba9
160 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector domains, including one identified as malicious infrastructure. The document body explicitly mentions 'free generator' and 'game hack' lures, and contains a call-to-action phrase. These elements strongly suggest a phishing or scam attempt designed to lead the user to potentially malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/how-to-get-free-minecraft-windows-10-game-hack In PDF document text
    • http://sbm-nn.ru/images/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://playhack.in/minecraftIn 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_002_off000034f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34F6 25132 bytes
SHA-256: b93268fc46123a2c7959b72cddec9b392ca2726b5219b27968993ac1abbfbb16
font_01_sfnt_off00006e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E44 18524 bytes
SHA-256: fe6ad3553d22b3ca012de373afe6f753a0e0722d907aa022396de61a87271ffc

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