Malicious PDF — malware analysis report

Static analysis result for SHA-256 431baa9438f8b2d0…

MALICIOUS

PDF

41.3 KB Created: 2021-05-14 15:03:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bccf78db41ab9f7c8e4cee6897329e87 SHA-1: 50bb366cffd2ad9539e5f01bcc353b36f37d2591 SHA-256: 431baa9438f8b2d0317ddf9a468260508d483cbf47290769ba24f36e8087ac8a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'game hacks' and 'free currency' generators. These links likely lead to further malicious content or phishing pages. The ML classifier also strongly indicated maliciousness, supporting the observed redirection behavior.

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/como-hackear-coin-master-en-espaol-game-hack In PDF document text
    • http://ferienwohnung-walker.de/images/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/minecraft-116-free_GM479516143.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_off000047ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47EF 24264 bytes
SHA-256: 4332e7ed7d8f949654fb30d2677466e5cd5bf7e9797a58f9643d3bfb35595280
font_01_sfnt_off00007f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F67 18224 bytes
SHA-256: 123f8386315a91293958179ffe58ecd8d69104faea04a921c44476c066c42c52

Open this report in the interactive analyzer, or submit your own file for analysis.