Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1ca09e368b2025…

MALICIOUS

PDF

48.2 KB Created: 2021-06-03 07:56:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1534842f82dfeaa92247520e67104a41 SHA-1: 022175c97e2b51bbcf4ecbb90e3119672fac4eec SHA-256: dc1ca09e368b202530b725a7d4ff0d33b07e2a03b01670bbe1ad5107dad3046f
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on domains associated with link farms and malicious redirectors. The document body and heuristics indicate a lure for game hacks and generators, suggesting a phishing or malware distribution attempt. The embedded URLs likely lead to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/free-roblox-gear-game-hack In PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/pubg-uc-zam_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/pokemon-go-free-walk_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-coins-for-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_off000051f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F1 25800 bytes
SHA-256: 808d59805525209479a09662b95d23c51b7ff4b47cb94b6926094584dd92d4b8
font_01_sfnt_off00008e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E52 3548 bytes
SHA-256: 37876dea8e0f06b3b4c7b71f13efe13355dfecdc9cc2814cd7c978a60e68b57e
font_02_sfnt_off00009a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A0B 18176 bytes
SHA-256: 6ea9eee9688bd29c5e0b74536b9be2ab390210d742e4038285307cb30709fc72

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