Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa535a912e135792…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 19:10:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5da2d1cf77257f1389f6319d4f14ae7e SHA-1: 3ef3db1a59e542b88fbc636fc873d990010f1fba SHA-256: fa535a912e135792f12d7c71729112a94edb467a745117224ee57af06d2443cc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, disguised as 'free generator / game hack' lures. The document body and extracted URLs reinforce this theme, suggesting the primary goal is to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a high likelihood of redirecting users to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-pastebin-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/robux-hack-2021-on-laptop_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-hacks-for-flight-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/cheat-manager-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/follow-people-inyo-roblox-games-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-promo-codes-2021-december-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-legit-no-scam_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/redboy-v2-jailbreak-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-bloxburg_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-skins-girl-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-cheats-2021-skywars_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-spin-coin-master-new-link_GM406889139.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_off00003173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3173 22236 bytes
SHA-256: 77ba8ed772060e43c595ecbe138f148a14190e7d4eebb04c88040e379470cd9d
font_01_sfnt_off000062c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C7 19092 bytes
SHA-256: 5bfd890d84b0c14d72a786ae590b650f833002b15fe449ee91ced07c3ea68d33

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