Malicious PDF — malware analysis report

Static analysis result for SHA-256 073fca4e2dab345c…

MALICIOUS

PDF

41.9 KB Created: 2021-05-16 19:28:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1056d8b35cc2eda603e142f555be9a8c SHA-1: d3cc29435fb75b604c475752b0b5a5246a338c6d SHA-256: 073fca4e2dab345cee0fece06f33812f20f693f1143b0b86090bf663ff584c0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically promoting a 'Roblox Cheat Robux Game Hack'. The ML classifier strongly flagged this PDF as malicious, and heuristic rules identified it as a lure for game hacks and a link to a known malicious redirector. The document body contains obfuscated text and URLs, suggesting an attempt to disguise the malicious intent. The primary attack pattern observed is social engineering via a deceptive lure to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/roblox-cheat-robux-game-hack In PDF document text
    • http://ambingenieria.com/images/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://ambingenieria.com/images/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/roblox-generator_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://ambingenieria.com/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/free-spin-link-coin-master-app_GM406889139.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_off00004777.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4777 25028 bytes
SHA-256: 1bea883ce943e8b756736bcdda3a9e31973610d119081778b10d503487f29558
font_01_sfnt_off000080a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A4 18424 bytes
SHA-256: a96f43e65daf9623fa7b9bc259dd656765653644365f0d7d49582fe5e9502473

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