Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e4f081a0d202ad…

MALICIOUS

PDF

41.2 KB Created: 2021-05-19 20:33:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 30db1ce372b6c70f8d54f6a27b86943a SHA-1: 19da4c5028a1755896d150c23bffb47f161f037a SHA-256: 38e4f081a0d202ad66a18befef791fec64dae34b287a8baaa2b8032e563e33cd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game-related lures, such as 'free generator' or 'game hack' sites. These links are designed to trick users into downloading further malicious content, likely other PDFs or executables, by impersonating popular games. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or malware distribution campaign.

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/1330123889/pubg-uc-rate-in-india-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/tiktok-for-free_GM835599320.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-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-minecraft-pocket-edition-for-free_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/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-18_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/tiktok-free-followers-hack_GM835599320.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-com-roblox_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_003_off0000457f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x457F 24476 bytes
SHA-256: c9de8edeb00a31d58cbaefee21be106a1dfa00e4103c6cb01c89cedaacea3d16
font_01_sfnt_off00007de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE5 18524 bytes
SHA-256: c6cc4dadc5245933dffaf9442a9d29a34b4a704be7ed1a0b979945e1cead643d

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