Malicious PDF — malware analysis report

Static analysis result for SHA-256 78013a552c3745b9…

MALICIOUS

PDF

40.1 KB Created: 2021-04-26 21:59:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 299c31268f8b322562600fc14c8df2e2 SHA-1: d231c5dee9d7a063b14b20f1009e40a5200ff6a5 SHA-256: 78013a552c3745b95877b437fd0292a157c66b1c3c951a46c8831a65d7505d88
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, leading to a 'free Robux' generator lure. The document body and heuristics indicate a clear attempt to trick users into visiting potentially harmful websites. While no scripts were directly executed, the embedded links and the nature of the lure suggest a phishing or scam attempt, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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-free-robux-in-one-second-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/how-to-make-a-free-account-on-roblox.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/battle-royale-hacks-jailbreak-roblox.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-a-free-golden-boombox-in-roblox.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-fast-money-robux.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/synapse-roblox-free.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-jailbreak-cheat-table.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/nintendo-switch-roblox-free.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hack-robux-2021-generator.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-boombox-roblox.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/sharkbite-roblox-hack.pdfIn PDF document text
    • https://freerobux.cyouIn 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_off00004142.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4142 25624 bytes
SHA-256: 3a6403d847bfeb0b592685341982f361868213541ab6607eaf3730c047a7ca48
font_01_sfnt_off00007a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6F 18456 bytes
SHA-256: a2b077274477e794a2d0fe0a00ac2a73ac8aee08fcabc72bb6a03ed6efb3be1b

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