Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebab77ee5b2e4bd…

MALICIOUS

PDF

45.2 KB Created: 2021-06-04 01:42:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 57b21beedb5d7cc2de598a53381edb29 SHA-1: 51c75f3771955cb72fb3b8344028930f9d339d6c SHA-256: 8ebab77ee5b2e4bd753bb82789862dd51ce76f51a0e37a4f5e32acf1954b956c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that advertise game hacks and generators, such as 'coin-master-mod-apk-2021-game-hack'. These links are designed to trick users into downloading malicious files or visiting scam pages. The presence of numerous redirector links and the ML classifier's high confidence score indicate a malicious intent to lure users into potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/406889139/coin-master-mod-apk-2021-game-hack In PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/mcpe-116_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-free-roblox_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_004_off000050f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F7 29144 bytes
SHA-256: 171aa09203f0b3a086bad6f9df0dd76dddf05455b77a5b309794efd46112f760
font_01_sfnt_off00008d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5D 18468 bytes
SHA-256: 3a864882e9e4289fde3385ccd09838686b667c82d90ee6c78e630994fecff89f

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