Malicious PDF — malware analysis report

Static analysis result for SHA-256 171079e8c284540a…

MALICIOUS

PDF

36.7 KB Created: 2021-05-21 12:35:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cd701bbb5b6f6eca4bf08f337cb7465f SHA-1: a16e33fd03978527ddeb0c5573581ed2e0f550ab SHA-256: 171079e8c284540a7b76dcc412e9800abbf6b1d17346a2066f77599e6f687079
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free Robux' and 'game hacks' to entice users. The document body and heuristics confirm the presence of these malicious links, which are designed to lead users to potentially harmful websites. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-can-you-get-free-robux-game-hack In PDF document text
    • https://www.croydex.com/uploads/files/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • https://www.croydex.com/uploads/files/files/fb-coin-master-hack_GM406889139.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_002_off000032e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32E4 25848 bytes
SHA-256: b81e71ee68d43cc2da6269d66c60962fc1bc1099d36f878c4d834ce390133be9
font_01_sfnt_off00006cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFC 18672 bytes
SHA-256: b25769fe22a84510cbe545ecc77c61068e90e31ebb29fb78564d629eaf3a10b0

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