Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3e030251838658…

MALICIOUS

PDF

33.5 KB Created: 2021-06-19 12:49:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 232ed170f908896b921fe336388a9b0f SHA-1: a9cef8316d36597dbb39199eb961b9930bf677cb SHA-256: dd3e030251838658b7dca9091d4cd93d55f4177214baf69b7f431d11c6f5a483
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, with one prominently featured in the document body and identified by heuristics as a malicious redirector. This link, 'http://netcdn.co/app/431946152/hack-de-roblox-robux-infinitas-2021-game-hack', leads to infrastructure known for distributing malware. The document's content and the presence of a 'download button' lure suggest an attempt to trick users into clicking the link, likely leading to a second-stage download. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/hack-de-roblox-robux-infinitas-2021-game-hack In PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/pubg-uc-567_GM1330123889.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/roblox-jailbreak-money-hack-check-cashed_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id//repository/pokemon-go-free-and-inter-egg-sting-development_GM1094591345.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/how-to-get-free-robux-easy-2021-december_GM431946152.pdfIn PDF document text
    • http://e-library.akbid-purworejo.ac.id/repository/cheat-engine-roblox-mac_GM431946152.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
font_00_sfnt_off00002b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B53 22164 bytes
SHA-256: 743bf47bc7344b475c69646c5a8bf8bcb4ecf7e4d6f0d3bcb5b66fe328162a18
font_01_sfnt_off00005c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C66 19588 bytes
SHA-256: b7b7593dd58003518281c1d21574c91ca01bb67d50d57fa7a27244c875480f18

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