Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca7b9871e274b08…

MALICIOUS

PDF

47.7 KB Created: 2021-04-27 08:18:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 34929cb6577eb081ad839cc949e1e700 SHA-1: e627844730629cd34dcb8ea0b8bc07a2e4922033 SHA-256: dca7b9871e274b0829a90915bd320f87901319cb91ceeeaa28c040fbbc756b6c
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body and embedded links suggest a phishing attempt to trick users into visiting malicious websites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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/free-5-robux-site-game-hack In PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-hack-on-phone-no-human-verification.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-free-roblox-cards.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-skin-strucid-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-promo-codes20219-for-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-account-with-free-robux.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/freerobuxno-games-no-sighning-up.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/bunny-ears-2021-free-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-without-human-verification-or-survey-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-generator-2021-gamingthix.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-hat-roblox-2021.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
stream_003_off000042b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42B9 39976 bytes
SHA-256: dace312513c6c1c4b3bb8db82b7bafcb52dd7e7b2f4dbaa19b84bdc3f20049a1
font_01_sfnt_off00009904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9904 18372 bytes
SHA-256: 590273c8ef255938c790ad42d216daef236f14066e3fbb5625678170b4857f47

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