Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdaa90e031764017…

MALICIOUS

PDF

44.4 KB Created: 2021-05-15 16:13:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 174c2f349e78bbf7d58de8f74ee362c0 SHA-1: c5dde68ccdcf12f2e70281b27548f5f49ac0ccbf SHA-256: bdaa90e031764017c0ff39adf35e90fe9c12cb3faf8544d6785c5f1c015fdb57
160 Risk Score

Malware Insights

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

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting "free Robux" and "game hacks" as a lure. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious intent to lead users to potentially harmful sites. While no scripts were extracted, the document's structure and embedded links suggest it's designed to exploit user interest in free in-game items to deliver further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/free-robux-roblox-promo-codes-game-hack In PDF document text
    • http://axia-verlag.at/images/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://axia-verlag.at/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://axia-verlag.at/images/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://axia-verlag.at/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://axia-verlag.at/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://axia-verlag.at/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://axia-verlag.at/images/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://axia-verlag.at/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://axia-verlag.at/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://axia-verlag.at/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://axia-verlag.at/images/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://axia-verlag.at/images/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://axia-verlag.at/images/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://axia-verlag.at/images/i-robux_GM431946152.pdfIn PDF document text
    • http://axia-verlag.at/images/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://axia-verlag.at/images/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://axia-verlag.at/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://axia-verlag.at/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://axia-verlag.at/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://axia-verlag.at/images/coin-master-daily-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_003_off00004ae5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE5 27856 bytes
SHA-256: e61a06d9c99f00c703a239f4ba6376c37838acc03e34a30ee2d5f46a763fca02
font_01_sfnt_off00008a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1E 18676 bytes
SHA-256: 9297a3cb5fba7ca587652f513aa1222127deb04773b45a9c0f6482a9c793d56f

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