Malicious PDF — malware analysis report

Static analysis result for SHA-256 237633211b9b82d3…

MALICIOUS

PDF

47.4 KB Created: 2021-06-04 01:49:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6e7edcf174ab0dc23fd1ef977569815e SHA-1: c78bbba1a461b7c3fcdc5e5717d37530fa38fd6d SHA-256: 237633211b9b82d3d693bd2a64776981a909448e46bf66c4a86633ecb12a94d6
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external resources, including a primary link to 'roebucks-on-roblox-game-hack' hosted on netcdn.online, which is flagged as a malicious redirector. The document body and heuristics indicate a lure for game-related cheats and currency, a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious redirection workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.online/app/431946152/roebucks-on-roblox-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-spins-hack_GM406889139.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
font_00_sfnt_off00005020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5020 25776 bytes
SHA-256: 370389e61e02afeaf2b9952d6f2b301e648e6015a73ea1f44f13108668a39185
font_01_sfnt_off00008b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7E 3500 bytes
SHA-256: 0ed1761f4e10049dbabdfde525d716995c1a30072e354a33f6c222630e768ae1
font_02_sfnt_off0000971e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x971E 18096 bytes
SHA-256: 660f2ad6d064874c4042e66c51e1deb22834a2626620b3d43ba9bd9331fe9e6c

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