Malicious PDF — malware analysis report

Static analysis result for SHA-256 d762cac9b55935b2…

MALICIOUS

PDF

48.4 KB Created: 2021-06-02 10:36:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3f3a1b3712911d41153955a9429da6a1 SHA-1: 925f8df1175b67ea5e94b4451e408e2dc41a6466 SHA-256: d762cac9b55935b2b98f373c8f122c1f1c55c7c865a5609f2bbb70f06bb98cad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The document body and heuristics indicate a lure designed to trick users into clicking these links, which likely lead to further malicious content or downloads. The presence of multiple PDF links suggests a chain of malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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-javascript-2021-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-18_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pokemon-go-free-items_GM1094591345.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005074.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5074 32284 bytes
SHA-256: ea3f8ee10b7c4c0505a388b6f05a0e1f88d7610c2286f7bb73102c677379367a
font_01_sfnt_off000097bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97BB 19324 bytes
SHA-256: 3a47f1fea234440bd0d6ac36277933044308e1a2100b126da87238770a858060

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