Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff86ffa1cf597a90…

MALICIOUS

PDF

48.3 KB Created: 2021-06-04 00:38:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: aa138d1af9a1a561bc0b3e142631b941 SHA-1: 17b5a7610af8c6991ba4a46d08a9972af0918f2e SHA-256: ff86ffa1cf597a9003c9c4b5104c794621b39fd2997f1f03b335fcbb4accf678
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to free game hacks and codes to trick users into clicking a link. The link redirects to malicious infrastructure, as indicated by multiple critical heuristic firings. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for exploiting client-side vulnerabilities or redirecting to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/479516143/minecraft-xbox-one-edition-digital-code-free-game-hack In PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-coins-and-spins-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_004_off000053de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53DE 25352 bytes
SHA-256: 7ff835b5ca4d854068aed723da214ae1a74e84dece177a3243b12f11301c6b0d
font_01_sfnt_off00008d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D79 3056 bytes
SHA-256: 3bf38ccea0f059764ae863929582790583b2dd886e86d92a85837ff3e16544f0
font_02_sfnt_off000097ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97EE 19008 bytes
SHA-256: fdc182bbb0097015eb5c04957e9722c28c9e7580ee65fff8630002b28e8f7f3d

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