Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f25b838a6a5e1c8…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 11:29:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a316d16d10c911cf76c4882dc2f3ad64 SHA-1: ed6f256cd0c5e27ce629d2a38a0edf0ada550f33 SHA-256: 6f25b838a6a5e1c8dd95cc54b5d7a1bb42de06aa7f09e0f0b2443521f3d7615f
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one specifically identified as a lure for a 'free generator / game hack'. The document body also contains a URL related to obtaining Minecraft for free, reinforcing the lure. The presence of multiple external links suggests a link farm or redirection to potentially malicious sites, likely intended to trick users into downloading malware or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/479516143/how-to-get-minecraft-windows-10-for-free-2021-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/robuxglobalcom_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-apk-latest-version-2021_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
font_00_sfnt_off00005387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5387 25064 bytes
SHA-256: fe071418515e42cc836b8b9fff218f49c345acaaf6d828e9a2319434336a21dc
font_01_sfnt_off00008b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B92 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9545 18648 bytes
SHA-256: 354bb2c2c4fae14b5c7df711c8f5a389dfe67cd832e4a835714c7b2f7ea7fa4d

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