Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4588ae312c2720…

MALICIOUS

PDF

44.2 KB Created: 2021-05-17 00:39:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d3122981b6f00c73d4cdd9cc5f683f0a SHA-1: cb4e1760631567085e97937cc57390e935bed2c4 SHA-256: ff4588ae312c27203cc8db84607c89d420298d3970d632ed3aaa46a35343e833
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector at `https://netcdn.xyz/app/406889139/get-free-cards-coin-master-game-hack`. The document body and embedded URLs suggest a lure for game-related cheats and currency, which is a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/406889139/get-free-cards-coin-master-game-hack In PDF document text
    • http://londiniumcentre.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49DB 24340 bytes
SHA-256: c311891f23335b36db0c7dc2ae04c35cefd61f98aef2c1eff4218760f1f7b6d7
font_01_sfnt_off00008147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8147 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00008b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2D 17884 bytes
SHA-256: 2df54ae97b7ad974d0fd113118d78f36970e506fc507bb8e05cd99f47a54c96c

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