Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbe7a26b46c6da4…

MALICIOUS

PDF

38.2 KB Created: 2021-07-05 19:10:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f64501149f06212c149d7edaabeed28d SHA-1: 252ac83d916f967aa9ae702491b10d68bd80d26b SHA-256: 8fbe7a26b46c6da4deeedda76fa36234cbcd7bcb428912e5a4475c25404c46fe
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a lure related to game hacks and free currency, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the heuristics confirm it links to external sites designed to trick users. While no scripts were explicitly extracted, the nature of the lures suggests potential for further malicious actions upon visiting the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.tw/app/406889139/free-spins-for-coin-master-without-human-verification-game-hack PDF link annotation
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-hacked-version-download-apk_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/cheat-apocalypse-rising-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/rbx-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/free-robux-generator-2021-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/roblox-medieval-warfare-reforged-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/dance-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-hack-a-roblox-character_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/pokemon-go-free-or-james_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/100-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/774-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/robux-hacks-not-patched-2021_GM431946152.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_002_off000033d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33D2 22676 bytes
SHA-256: a1ef84def4bf18aecd7e3f991e0607abcb9070a2473c68b86566196d2244dd86
font_01_sfnt_off00006691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6691 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00007076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7076 19072 bytes
SHA-256: ab456d8fb78f7a75ac8c0c3e18ca03385b605ca6326ff6a6876da9d238efa35b

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