Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2eabf41de5b363…

MALICIOUS

PDF

44.9 KB Created: 2021-04-28 05:54:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ff96a01476b64330de23facccf1cd5e0 SHA-1: 10bf4293d67d275b8fce259817d7447e8627cfdf SHA-256: 9d2eabf41de5b36302270c5f3847073b3c22d0310bf67b26a4d7d4b14b2831d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a 'free generator / game hack' lure, which is a common tactic for phishing or scamming users. The link directs to infrastructure known for malicious activity. While no scripts were directly extracted, the PDF structure and heuristics indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

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 https://netcdn.xyz/app/431946152/how-to-get-roblox-credit-for-free-game-hack In PDF document text
    • http://www.saburai.ac.id/elibrary//repository/daniel-hack-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-mods-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/fencing-roblox-hacks.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-hack-and-cheats-apk.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-obby-gives-free-robux-with-game-link.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/launcher-hack-dinosaur-sim-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-marshmallow-head-in-roblox-2021-for-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-hack-de-dragon-ball-rage.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-speed-race-hacks-download.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/apocalypse-rising-hacks-roblox-crash.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000043e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43E4 26548 bytes
SHA-256: 6138a9be78391c3922cc370616c8c93e5519bde6895ddba85c268b8cef9ec59b
font_01_sfnt_off00008018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8018 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC0 18508 bytes
SHA-256: aaee93be15afea3f34265028f72e14c8d8177a28a7e511fa9958eeec3e94f784