Malicious PDF — malware analysis report

Static analysis result for SHA-256 26503d385574989b…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 17:27:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f1b35bcd3747e5dfe022061d63400aa3 SHA-1: 7d0b60495802eae62dea65a5acd64dc5ca3cb2b9 SHA-256: 26503d385574989bfcf3300d48a8929474cd09c21671dfedf20a0f2190d84f64
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users into clicking on them, promising game hacks and free currency. The primary redirector URL is http://netcdn.tw/app/406889139/coin-master-coins-game-hack, which is associated with malicious redirector infrastructure. The document body and heuristics indicate a scam related to popular mobile games, aiming to drive traffic to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/406889139/coin-master-coins-game-hack In PDF document text
    • http://stitqi.ac.id/website//repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/download-speed-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coun-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-really-hack-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-links-for-today_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_002_off00002f6a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F6A 22616 bytes
SHA-256: 9f8a612ed03adefdd8896adc85afd06709e456b7801204f409e509d3855f1f46
font_01_sfnt_off000061e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E0 17836 bytes
SHA-256: 84574f8323a35f53ec0be3b5c2b4531289117d356e64a8613214cbf4efbbad2d

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