Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d42377455730a92…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 12:04:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2de946195ca92202fa7b61dbe7e2daba SHA-1: a29c856476392b583b3f31d72d2b7a90da8473d5 SHA-256: 9d42377455730a920e5880a76ab1f2957103d403d2da3b3765549519e2b2d6a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and document body text that explicitly advertise 'free Robux' and 'game hacks', directing users to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the primary attack vector appears to be a social engineering lure to drive traffic to malicious sites.

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-mobile-game-hack In PDF document text
    • http://library.umla.ac.id/repository/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/for-creeper-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-ben-ten-universal-showdown-cheat-codes_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/20210-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/get-free-robux-gg_GM431946152.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_off00002f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F35 22848 bytes
SHA-256: 8a81c2595cea20bbcad0be3a6de7e33ce99b744139e39da2d5bf533c10b7ccd7
font_01_sfnt_off00006278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6278 19104 bytes
SHA-256: 573e3addcc1a6fdc5e08f445db2ef54d6c45d37482ab709f67476411b6906f7c

Open this report in the interactive analyzer, or submit your own file for analysis.