Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8bb0d04f9ceae64…

MALICIOUS

PDF

43.1 KB Created: 2021-05-14 10:25:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 64bd797f9d24cbe8e6447421aae57fd5 SHA-1: 282aac58f2796c0bca4afb3065a93c0f036a16d8 SHA-256: e8bb0d04f9ceae644da81fa1291fcd2a66e79759deffe3ffb4e946993758fccc
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, including one to a known malicious redirector at `https://netcdn.xyz/app/431946152/robux-sign-game-hack`. The document body and extracted URLs suggest a lure related to game hacks and currency, aiming to trick users into visiting these malicious sites. The presence of multiple PDF links and a download button lure further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/robux-sign-game-hack In PDF document text
    • http://bpbfloydinc.org/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/rbx-sites_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/robuxglobalcom_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/login-robux_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-robux-no-human-verification-and-no-survey_GM431946152.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_off0000494c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494C 26252 bytes
SHA-256: d7681e1c479307253ce2a8a20c57da79a741fb76b59042bda6171bfc64680d5b
font_01_sfnt_off000085ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85FF 18260 bytes
SHA-256: d979ccd66367cffe0923c7c168b8d9239fab8865d1d9d8d0be6a8c4d84c57473

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