Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8018d840d869ef…

MALICIOUS

PDF

44.6 KB Created: 2021-05-17 06:39:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8a7b9e1969369582c1bf9fe57c66c941 SHA-1: 1cea4a0fbedcf6531fd9df2a784079ad9f8633dd SHA-256: ce8018d840d869eff2e82043e11a25a480ed27a1cb115c2ee31c23af0cd14d92
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, under the guise of game hacks and free currency. The document body and heuristics indicate a lure to download or visit these sites, likely to deliver a second-stage payload or phish for credentials. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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 https://netcdn.xyz/app/431946152/how-to-get-robux-fast-game-hack In PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-game_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004929.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4929 24460 bytes
SHA-256: 5d3b829d55dcef1fe5a5b9577c18275d23200529f7e1806051fcda082bb0d458
font_01_sfnt_off0000810e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x810E 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABF 18512 bytes
SHA-256: 4dc4e0cad61ef76bfeae7ffde68b6df350db2c75fc0ee4ed4c08fe52eaa40496

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