Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4ae4659e40687e…

MALICIOUS

PDF

42.6 KB Created: 2021-05-17 14:05:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9f619061f8ce4302154aa662f031762d SHA-1: 4a8c58a982a3ab67cce22bfa7eb1a2ba0d96b621 SHA-256: fe4ae4659e40687e06d7e4b1e4a283241d6e79a7a2cc5bfa34637ccf8d7cd34f
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed to lure users into clicking links related to game hacks and free rewards. It contains numerous links to external PDFs hosted on what appears to be an SEO link farm, and also directs users to a malicious redirector. The presence of these links and the lure content strongly suggest a phishing or scamming attempt, likely delivered as a spearphishing attachment.

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/coin-master-coin-link-game-hack In PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/master-free-spin_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-free-spins-8-14-2021_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_off00004d18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D18 25068 bytes
SHA-256: 43a9f29a1397151360145c881215640a5951f6959769f9bd9509a9e795ba74f3
font_01_sfnt_off000085e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E0 17716 bytes
SHA-256: 6b6be525affa70ffc107ac4c88dd9d04ef97920621a7989faf1a85e6391895c0

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