Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab86b2a848f7ef07…

MALICIOUS

PDF

36.2 KB Created: 2021-06-19 13:39:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1c15fe65b5eac25f6c568b4c56eb1e7d SHA-1: a3c8c1fc2f1c4c81e8add499b5ed63875fa35843 SHA-256: ab86b2a848f7ef072de52832390d8d6d85b9e3a3c9e9a647ba957ea57a4da1b9
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a redirector, which is flagged as malicious. The document body explicitly mentions 'Free Roblox Gift Card Codes' and 'game hack', indicating a lure for potentially unwanted or malicious content. The presence of these links suggests the document is designed to redirect users to phishing or scam pages.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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-gift-card-codes-2021-march-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-a-free-radio-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/app-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-without-buying-it_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robux-earner_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/tiktok-free-qr-code_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-minecoins-in-minecraft_GM479516143.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_off0000336c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x336C 22748 bytes
SHA-256: 53b7ca7bdabcd2dc13b062645f626797503a2cbc3f2d826ce7bce1a75c13423f
font_01_sfnt_off00006652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6652 19812 bytes
SHA-256: 24b490652d7ba7b1d75afa3b79f5a53e325de99f5e5c77c6fd8468aab546bfb6