Malicious PDF — malware analysis report

Static analysis result for SHA-256 182be278976e4f8c…

MALICIOUS

PDF

42.5 KB Created: 2021-06-13 22:56:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3107943ba9a44a7bd41e53f0818786ff SHA-1: bd70a748fa520066b59bb35b396d2d24ef1dfdc3 SHA-256: 182be278976e4f8c423e427e2315d7c37030deb4ceca5c59a46c869e1003a95f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, disguised as game hacks or cheat codes. The document body, though partially corrupted, contains a primary URL that is also flagged as a malicious redirector. The presence of multiple embedded URLs and the ML classifier's high confidence score indicate a deliberate malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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.co/app/431946152/roblox-prison-life-cheat-codes-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-accounts-with-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/spiderman-free-roblox-stuff_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-toy-code_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pastebin-raw-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-hacking-page_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-hack-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-booga-booga-mojo-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-how-to-hack-prison-life-202-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/survivor-hacks-script-roblox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-any-hat-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-studio-library_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-promocode-for-robux-july-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-hack-dark-devs-one-piece_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pokemon-go-free-items_GM1094591345.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/easy-roblox-hacks-not-malware_GM431946152.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_002_off000047d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47D3 25932 bytes
SHA-256: c24e521b75e3a35da778d238c06478e0251b60574a995dc76fc543e54f36fca0
font_01_sfnt_off000082a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A3 18732 bytes
SHA-256: 927e47e8fab9e77ea4fd426156882f41a13791faa3166dab6479150cce0e4d23

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