Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e45e7718116d8d8…

MALICIOUS

PDF

35.0 KB Created: 2021-06-26 05:35:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 37eb44ea257c4def4dceb037321ee46a SHA-1: 4380765ad0ee515ea500a1f049da372a2c0c87a7 SHA-256: 9e45e7718116d8d80251b33d444af842863e3dac7b47d51029bfcc71790e202a
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks or free item generators. The primary link directs to a known malicious redirector infrastructure. The document body and heuristics indicate a link farm strategy, with many URLs pointing to other PDFs hosted on a university repository, likely for SEO manipulation or to host further malicious content. No scripts were extracted, but the overall pattern suggests a phishing or scam campaign leveraging external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-roblox-accounts-v3rmillion-game-hack In PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-star-wars-lightsaber-battles-free-level_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-village-3_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/corn-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-on-roblox-apocalypse-rising_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/commands-for-roblox-free-rubux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-cheat-engine-lumber-tycoon-2-money-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-sign-up_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-codes-2021-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_off000030c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C4 22228 bytes
SHA-256: dd2c99c61d7039e45fc906aef9d247a36e5ee46a5cec5a57e89ad5cda47659ce
font_01_sfnt_off0000622a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622A 19584 bytes
SHA-256: cfd1980336559b3468904f66f00673718168ed3fe60592ca26c765c3d98dd2d0

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