Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64925698aa61f73…

MALICIOUS

PDF

44.4 KB Created: 2021-06-10 17:45:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ef3ad31c1788e638ab3fcd161f173598 SHA-1: 9c4067e473406815a26f52c4dd0045adf9cd6b6e SHA-256: e64925698aa61f73b1bc5a9a2c868ffdfd87cf70c833a39c627cb8a580c0c2de
160 Risk Score

Malware Insights

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

The PDF document contains a lure for a "free generator / game hack" which links to malicious redirector infrastructure. The document body and embedded links suggest a social engineering attempt to trick users into visiting potentially harmful websites. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious workflow designed to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.
  • 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.tw/app/431946152/free-robux-hack-no-human-verification-2021-game-hack In PDF document text
    • https://lib.unitri.ac.id//repository/xray-hack_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/pokemon-lets-go-free_GM1094591345.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/hacking-dungeon-quest-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-account-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/master-free-spin-and-coin-link_GM406889139.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
stream_004_off00004f44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F44 24836 bytes
SHA-256: ed014af8003cf3e651b3e065ba81f7c4cf062ad59f7530d034c3de57ed92bbe8
font_01_sfnt_off000087a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A4 19432 bytes
SHA-256: 1db0ca193312892c5ddff7a605b31da76f98d469b2a490995e6a3c6d3a28984c

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