Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4ed126f0867bf4…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 01:29:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9cf228ebd12f93d82386e9e2bb7aa357 SHA-1: c82b4578b6d868d5d2fdbb9f3be5874bbe6095e4 SHA-256: 7c4ed126f0867bf4e5cb2bcf33e3e72d669bfeecffa6c1c5176260b28360058f
142 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are SEO-optimized and point to game-related hacks and cheats. The primary lure appears to be a 'free generator / game hack' redirector. While no scripts were explicitly extracted, the PDF structure and the nature of the links suggest it's designed to drive traffic to malicious or spam-laden websites, potentially leading to further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-spins-coin-master-apple-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/roblox-cheat-engine-download-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/do-u-get-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-redeem-cards-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-robux-vidos_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-play-rocitiaens_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/i-just-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-ninja-legends-hacks-download_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-roblox-with-cheat-engine-651_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/robloxbuddy-me-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-accounts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hack-para-tener-dinero-infinito-en-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-december_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3232 23052 bytes
SHA-256: 767acaa714487191f9d060415cbfc83e9dc171ce535acd2bee68975969267028
font_01_sfnt_off00006610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6610 18248 bytes
SHA-256: 5fc4058085e688ccbd2e279a6fdf32c136df5194189f80f266052c2afd8c01d6

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