Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ec07dc5ece3c18…

MALICIOUS

PDF

43.7 KB Created: 2021-05-12 20:09:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 47f6c7048ec053f0e163c9195b7eb35e SHA-1: 0ee80a2ef9698387a5b75f26ae5cc4cca330d488 SHA-256: 17ec07dc5ece3c1820a76938b5968e23fa39cf8a823f1db823a9430294a31344
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to a 'free generator / game hack' lure, indicating a social engineering attempt to trick users into visiting malicious infrastructure. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the document body and heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/406889139/how-to-get-free-spins-on-coin-master-game-hack In PDF document text
    • http://immo360grad.com/images/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/how-do-you-get-free-coins-in-coin-master_GM406889139.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_off000048b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B6 23988 bytes
SHA-256: cfa0940a4784540470d83dc09c77d4b4957d1c04d4eb10d8e6e8136055264355
font_01_sfnt_off00007f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3D 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000088ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88EF 18052 bytes
SHA-256: ea84a6236c2a6e621998df031dd6ced14717eafc49be4f8ccfac8b30b37a9d36

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