Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b18ab53bced971…

MALICIOUS

PDF

45.0 KB Created: 2021-06-04 02:12:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0b7b1c5306e2976cad190e56ec3e8dda SHA-1: ba927878853af94d0b0353fb3ed622fd5afd0b0b SHA-256: e5b18ab53bced971231075213fbf1e821dc515e4b58687a7a99737120bafb1c3
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed as a link farm, with a primary lure related to 'free Robux' or game hacks. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' indicates these links likely redirect to malicious sites. While no scripts were extracted, the structure and content strongly suggest a phishing or scam attempt to drive traffic to potentially malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • 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 https://netcdn.online/app/431946152/can-i-get-robux-for-free-game-hack PDF link annotation
    • http://perpus.ar-rum.ac.id//repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/redeem-roblox-virtual-item-free-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-do-a-dick-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51FD 25344 bytes
SHA-256: ee865730ef8ceca281e5d1a39900263c3b04facf479287c9e633200bd32ce49a
font_01_sfnt_off00008cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF9 18344 bytes
SHA-256: 56a64ad9af2fab004080c55c49ec35472f3c2134e95e40197be892b268dd39d5

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