Malicious PDF — malware analysis report

Static analysis result for SHA-256 883320682223c094…

MALICIOUS

PDF

42.0 KB Created: 2021-05-13 07:01:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 70620a2e503b9659b3e671f393107bcc SHA-1: d455dd6b3c94da5649e472b9598d7c2b761d468f SHA-256: 883320682223c094135fb6144f3884b7d3117ef08aa4ae28c714025aa70703f8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users with promises of game hacks and free currency, redirecting to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the document body, though partially obfuscated, contains references to these lures and embedded URLs. The primary malicious activity observed is the redirection to a known malicious URL, likely as part of a phishing or scam campaign.

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/406889139/coin-master-free-spins-ios-game-hack In PDF document text
    • http://skwolcott.com/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://skwolcott.com/images/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://skwolcott.com/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/coin-master-support_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://skwolcott.com/images/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/free-robux-roblox-promo-codes_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_off0000492f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492F 25064 bytes
SHA-256: 4fade163046aa1494a1a794bc3ffc743112883e99ce71d4f34861f188ac8e16b
font_01_sfnt_off000082fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82FC 17884 bytes
SHA-256: ed32a7283540f03019957517c048a41e05a4a835eff26d475850fba8ab898570

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