Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cafa9dd52268168…

MALICIOUS

PDF

55.4 KB Created: 2021-05-17 09:03:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 184629a1525dee6321d9da8762133a5b SHA-1: 25ed76249c52a8d7efd41133f8452d82e8e91a52 SHA-256: 5cafa9dd522681682a3801d44476af0cc4d7f4d1b14b0fe6c8d30fba48f6de17
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "Real Coin Master Hacks". The primary malicious URL identified is https://netcdn.xyz/app/406889139/real-coin-master-hacks-game-hack. The document body and embedded URLs suggest a social engineering lure to trick users into visiting these sites, likely leading to further malware downloads or phishing attempts. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8531

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/real-coin-master-hacks-game-hack In PDF document text
    • http://w-i-r.de/images/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://w-i-r.de/images/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://w-i-r.de/images/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://w-i-r.de/images/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://w-i-r.de/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://w-i-r.de/images/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1B 27292 bytes
SHA-256: b8fbb7783f6e930ed65f881f26b782659c040fd43303a372efa1d9d0f5fb8948
font_01_sfnt_off00008b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B23 3088 bytes
SHA-256: e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222
font_02_sfnt_off000095ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95EE 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000a914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA914 17788 bytes
SHA-256: c971b34c329d205054a16b1b5f827a74783bca0f841d374511d085dfea161b8f
font_04_sfnt_off0000c990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC990 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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