Malicious PDF — malware analysis report

Static analysis result for SHA-256 beaa86775ffbe034…

MALICIOUS

PDF

42.5 KB Created: 2021-05-01 19:19:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1b2bfc8fdbe43b1b3afbac963427d8b0 SHA-1: 40c835762609fd7de017553a4f7fcf55fa2078a6 SHA-256: beaa86775ffbe034fccf910e1d59a0271fd762a09bb08830e70f8d50e8e012e8
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to entice users into clicking embedded links. The primary link redirects to known malicious infrastructure, indicating a likely attempt to deliver a second-stage payload or phish for credentials. The document body contains multiple URLs, including the primary malicious redirector and several others hosted on a seemingly compromised educational domain, all related to the same lure.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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-change-the-script-on-roblox-2021-free-robux-game-hack In PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-roblox-free-robux-and-tix-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-accounts-with-builders-club-and-robux.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-accounts-with-1-million-robux.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-hack-no-human-verify-for-tablets.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hack-de-robux.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-rogue-lineage-for-free-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/get-free-robux-now-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-obc-roblox-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-free-no-download-unblocked.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-on-a-computer-safely.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_off00004274.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4274 27076 bytes
SHA-256: 48463e8d1fcf8926c65e1e5db9655cd25f6d550f29cd6b3c046b8a39ad06e98a
font_01_sfnt_off00008023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8023 19736 bytes
SHA-256: 3a4dba1692e3cc1d9fb97377639938031ce5d31893ddac062847591fc16772e4

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