Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d037c4691dad16…

MALICIOUS

PDF

43.9 KB Created: 2021-05-13 16:36:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a35649bd0ea62378b6c329c4f83aad8c SHA-1: a1e282790cdb3d8200c9198fb1bd956db1fa207e SHA-256: b2d037c4691dad16a3d91552b5725b33e07e902943b2790f29b9b6776562ab99
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting "free Robux" and "game hacks" as a lure. The ML classifier also strongly indicated maliciousness. The document body and embedded URLs reinforce the lure of free in-game currency or cheats, which is a common social engineering tactic to drive clicks to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-not-fake-game-hack In PDF document text
    • http://moto98.com/images/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://moto98.com/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://moto98.com/images/free-100-robux_GM431946152.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_off0000479c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x479C 28184 bytes
SHA-256: 7800a4e14eab651e4788d1588f1e113376a616a08064458586a50c40586728a4
font_01_sfnt_off00008898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8898 18516 bytes
SHA-256: ca79d80576681ece98af22104654f282f19bfdcccdd95bbb76316d29f9029162

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