Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5853285cb9b206…

MALICIOUS

PDF

42.7 KB Created: 2021-05-19 08:11:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 356df6c2c09316d5d2066b65c34be679 SHA-1: 4aa3f512f610fe030d90b329231320348db07ebe SHA-256: 3e5853285cb9b206257a2f34fb6990e4c54f7da9f3226a86a8e8fd89264213be
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are part of a link farm designed to lure users with promises of game hacks and generators. The primary redirector URL, https://netcdn.xyz/app/406889139/open-coin-master-game-hack, is flagged as malicious. The document body and embedded links suggest a social engineering tactic to drive traffic 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/406889139/open-coin-master-game-hack In PDF document text
    • http://pwpyemen.org/images/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/roblox-images_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://pwpyemen.org/images/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • http://pwpyemen.org/images/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://pwpyemen.org/images/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://pwpyemen.org/images/give-free-robux_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/how-do-u-get-free-robux-2021_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_off00004d26.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D26 24820 bytes
SHA-256: a73383296685006f25d30dc7a89cae36b2cfecb43d55279cc9942f828e84de1f
font_01_sfnt_off00008635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8635 17724 bytes
SHA-256: 50fa6083fcbea3c37b42e9adc6f7c49d783d65341cfa8b80ae78b0fdb62cf2e6