Malicious PDF — malware analysis report

Static analysis result for SHA-256 85dacf55f989da26…

MALICIOUS

PDF

34.8 KB Created: 2021-06-27 02:42:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4d4fee3f793eca7db14dfa37d835309f SHA-1: f6eaea066f3167268f047b4c36bfd70507bbe4d7 SHA-256: 85dacf55f989da267ddc940f45e6261c471fed16e3a6159e4fdf2bcc9d8acfb7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links, including one that redirects to malicious infrastructure advertising game hacks. The document body and embedded URLs suggest a lure for users seeking in-game currency or cheats, which is a common social engineering tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure indicate a high likelihood of the document attempting to redirect users to a malicious site, potentially for further exploitation or credential harvesting.

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.co/app/431946152/prison-break-hack-script-roblox-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-with-fake-credit-card_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/html-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-h-ck_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/fps-hacks-roblox-aimbot-how-to-activate-ambot_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/startingploit-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-run-lua-script-roblox-hacks_GM431946152.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
font_00_sfnt_off00003222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3222 21936 bytes
SHA-256: 435b1897c558b4af0dc06caf83ce69a7a07177d60a9702339c8252f267905cdb
font_01_sfnt_off000062af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AF 19212 bytes
SHA-256: 71eb850a14e9b441cc154cd1a2774d4b4bff537ce5d129de93ac942926c3fcbc

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