Malicious PDF — malware analysis report

Static analysis result for SHA-256 49052b5dd4fe278f…

MALICIOUS

PDF

208.4 KB Created: 2021-07-09 06:06:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fe0b514a2426107fcd77084cc14008a0 SHA-1: 7c201d8ef57f8eb8485f06c122329b32544013ab SHA-256: 49052b5dd4fe278f4bdbe53eb4fa8f0104d72982b0a762ffbaa7c3ae36ba10b5
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'game hacks' and 'free generators'. One prominent URL, http://netcdn.tw/app/1094591345/pokemon-go-free-to-download-game-hack, is identified as a malicious redirector. The document body, though partially corrupted, contains references to similar lures. No scripts were extracted, but the primary function appears to be directing users to potentially malicious websites through embedded links.

Machine Learning

  • Nyx PDF Classifier clean score 0.2331

Heuristics 3

  • 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.
  • 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.tw/app/1094591345/pokemon-go-free-to-download-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/robux-gainer_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-robux-wivout-paying_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-computer-only_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-ninja-suit-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-games-free-play-now_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-hack-para-android_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00032159.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32159 11351 bytes
SHA-256: bd97abed15b1514539c06bc207c73aea9607bbc01e3f470d5e0adad900205d99