Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f5c31380825a69d…

MALICIOUS

PDF

40.2 KB Created: 2021-04-27 07:15:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 34c787d4c0c161ae276af5856e87cf30 SHA-1: faca910db55357f92fcdfc8944a4e00b2dc2c445 SHA-256: 7f5c31380825a69d70dc64e5e33b33048c397935d3dce0e333e77c4678ba556b
200 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and lures users with promises of free in-game currency, a common social engineering tactic. The document body and heuristics indicate a strong intent to drive users to external sites, likely for credential harvesting or further malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/free-robux-no-buying-armanda-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-shard-online-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-play-a-game-that-cost-robux-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-cheat-engine-download-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-a-lot-of-robux-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/robux-hack-no-human-verification-android.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-dance-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-hack-into-files-to-get-robux.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/assassin-roblox-hacked-uncopylocked.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-free-boombox-script.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003e8b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3E8B 24852 bytes
SHA-256: 91c29456c2dd64774019d843addb78cc36f39ebd8568b85a7fcd120870a7b2b9
font_01_sfnt_off00007837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7837 19264 bytes
SHA-256: f9202992d730abe2da59ef95b2c9f61cf75650d92fad1a2b133804f61ef2edc5

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