Malicious PDF — malware analysis report

Static analysis result for SHA-256 241aff6b9388e7a6…

MALICIOUS

PDF

42.6 KB Created: 2021-05-15 11:11:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7cdea4b29c6473260e9dd6b1836cd788 SHA-1: c8db0d8908a67291e1524071dccf5f19bccf0d47 SHA-256: 241aff6b9388e7a64bb7ccc175e4f009b35bf2d89dae5e669a2151fa3e615b7a
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that are flagged as malicious redirectors, specifically leading to a 'free Robux generator' lure. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to redirect users to malicious sites, likely for further payload delivery or phishing. The document's content and heuristics point towards a social engineering attack leveraging gaming-related scams.

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/431946152/free-robux-generator-for-roblox-2021-game-hack In PDF document text
    • http://altc.de/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://altc.de/images/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://altc.de/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://altc.de/images/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://altc.de/images/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://altc.de/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://altc.de/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://altc.de/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://altc.de/images/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://altc.de/images/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://altc.de/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://altc.de/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://altc.de/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://altc.de/images/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://altc.de/images/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://altc.de/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://altc.de/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://altc.de/images/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://altc.de/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://altc.de/images/free-spin-coin-master-app-download_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_off00004a09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A09 25360 bytes
SHA-256: 66ab9f25704c5b2b9c87f19c5c28dc9fb181974029d38828214fcdae61448e94
font_01_sfnt_off00008273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8273 18820 bytes
SHA-256: ebe9c90542e8fe2fea15c90130dc88571bff9717049b6ef0e566bae53a322baf

Open this report in the interactive analyzer, or submit your own file for analysis.