Malicious PDF — malware analysis report

Static analysis result for SHA-256 229f5e9e8208e109…

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 19:37:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 925578c59f2d9fb0226276ab11dd6642 SHA-1: 6cf415944a7ea32d1fea45a44cf9333d4b072386 SHA-256: 229f5e9e8208e1093f751c43f15ba79b0a7fded31a80105945757158f72a6231
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to malicious infrastructure, specifically promoting "free Robux" and game hacks. The primary redirector URL is https://netcdn.xyz/app/431946152/rbx-gg-free-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit user interest in free in-game currency to lead them to potentially harmful sites. The document body contains garbled text but includes references to the lure and the primary redirector URL.

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/rbx-gg-free-robux-game-hack In PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--apartementos-smfora-cala-ratjada-4vc.de/images/how-to-get-free-spins-on-coin-master-game_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
font_00_sfnt_off000049f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49F8 25116 bytes
SHA-256: 0fafbdbf71b768f8f38fedbd3681bfa73583918bb9b950af770ee70de94e7c71
font_01_sfnt_off00008452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8452 18304 bytes
SHA-256: d1ad45f5b083d36c6ec4c124be04f92537ae8dd31535970cb7662339535ad89d

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