Malicious PDF — malware analysis report

Static analysis result for SHA-256 618bca5932b7b6ec…

MALICIOUS

PDF

43.4 KB Created: 2021-05-16 15:01:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ceae2cdcdaade9d3a5f64d5f74477733 SHA-1: 62c89eedb00d77970b4e0a4b1e9af06ecc72d362 SHA-256: 618bca5932b7b6ecbea3c1ad082583614348387a5664cb67fe96d4d6910618df
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a malicious site, likely for a scam or to download further malware. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 3

  • 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/legit-coin-master-hack-site-zyngaplayerforums.com-game-hack In PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/grab-points-login_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/wurst-mc_GM479516143.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.alpaca-buitensport.nl/images/coin-master-free-spin-no-offers_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_off00004c46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C46 24768 bytes
SHA-256: 6f10bd88ce89877b77a698d160b3da167729de30455dfa761944846d8b8d03b7
font_01_sfnt_off00008563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8563 18996 bytes
SHA-256: c7201ec4c3a8de5860eeb2e6c9e6c90ee147184e9a3338a06e2bc3af5219e027