Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d3bef8ecb20e6c…

MALICIOUS

PDF

34.7 KB Created: 2021-07-19 05:51:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5318bf24013c4622d6f183f6817436c3 SHA-1: e280593094312cab228b0ff177f3cf816b845552 SHA-256: 93d3bef8ecb20e6cab934fd0cccbdce97a083fb0140319e671d2bb7e82c610b6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector infrastructure, designed to lure users into downloading potentially harmful content. The document body and heuristics indicate a scam related to game hacks and free generators, suggesting a phishing or social engineering attack. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.tw/app/406889139/free-spin-coin-master-link-2021-game-hack In PDF document text
    • http://www.bbnest.it/images/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://www.bbnest.it/images/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://www.bbnest.it/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.bbnest.it/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://www.bbnest.it/images/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://www.bbnest.it/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.bbnest.it/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://www.bbnest.it/images/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • http://www.bbnest.it/images/coin-master-free-spins-link-2021-today_GM406889139.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_002_off00002f02.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F02 23816 bytes
SHA-256: 27dd0216d8bc2ed5b9ffaec098ae51fd262d5ede63886bccfdfd96dead3f2237
font_01_sfnt_off0000651c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651C 18456 bytes
SHA-256: e9900cc34792e9e10189734f2c0a95be85fa7d2c8d6cb23872c5da80ce816735

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