Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1e020fd81d9754…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 21:24:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 625630c3b23743b6f88c9287aeae13fa SHA-1: 701713fde6b9a5bd0558f185d4705737d082be63 SHA-256: 2d1e020fd81d97543115099f12950ea1678ebed1c124c9996e504ce364d9e69c
160 Risk Score

Malware Insights

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

This PDF document employs a lure of free game generators and hacks to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or exploits. The ML classifier strongly indicated maliciousness, and the document body contains multiple URLs that reinforce the lure.

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/406889139/free-online-generator-for-coin-master-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-ban-people-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/80-robux-a-day-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-free-telechargement_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-made-by-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-old-roblox-acocunt-giveaway-pastebin_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-use-winrar-for-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-roblox-robx_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-tycoon-model-roblox-with-dev-purchases_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-sand-simulator-infinite-backpack-code-hack-android-no-script_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/chill-face-free-roblox-shirt_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/legit-free-spins-coin-master_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_off0000327b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327B 22456 bytes
SHA-256: d23a672e4f6c500ec4d42e3d108ace2a2150bafd5ce106feed77267ed7710a8d
font_01_sfnt_off0000642d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642D 18072 bytes
SHA-256: 9b9ca6a1ebabc5184410020ce6f00603c34c06d6c59453e1e72546e3244d6c52

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