Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4e7b301a9725f8…

MALICIOUS

PDF

44.8 KB Created: 2021-05-12 09:12:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 235a994c61a45a622b5d6a31dc54fce8 SHA-1: 412b03b8c25a1284cc8ccdd1427a6f20d8823510 SHA-256: 9c4e7b301a9725f8a8e88b30c0d586255b90c84c1dcb5d8cbe4f44398fcd2aba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links to known malicious redirectors, specifically advertising 'free generator / game hack' lures for popular games. The primary malicious URL identified is https://netcdn.xyz/app/431946152/roblox-com-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and malicious links strongly indicate an attempt to lure users to external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/roblox-com-robux-game-hack In PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.centralbarbershop.ru/images/coin-master-hack-generator_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_003_off00004c7f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C7F 28036 bytes
SHA-256: 684d97dd94cdaad749554491fb1850e6ff9aad557bacc7ecf5cbf9106fd15245
font_01_sfnt_off00008d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D72 18184 bytes
SHA-256: f249dc7b85a63207670df4799ed7b071bbb563f249806a7da362391acbd0ae63