Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c85aa50cb44d24…

MALICIOUS

PDF

43.7 KB Created: 2021-05-17 22:07:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 73f14342c8391afb09d318eb2e3ee71d SHA-1: 30e15c81a0623fb5e696709855a0e081c5f7506d SHA-256: 49c85aa50cb44d24fcffa421c6d2cd506edd0b2b29a496c6cbef0a16fe47c9b8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free spins" for games like Coin Master and Robux. The ML classifier and specific PDF heuristics strongly indicate malicious intent. The document body and embedded links suggest a social engineering lure to drive users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-spin-cheat-game-hack In PDF document text
    • http://britishcomics.com/images/minecraft-tools_GM479516143.pdfIn PDF document text
    • http://britishcomics.com/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://britishcomics.com/images/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://britishcomics.com/images/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://britishcomics.com/images/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://britishcomics.com/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://britishcomics.com/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47CE 24392 bytes
SHA-256: 78713ad35c60cb4105a6e1c85076b434db1fed1234332fb7a02fa38e0e9a2c25
font_01_sfnt_off00007f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F61 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000894b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x894B 17888 bytes
SHA-256: 6e952cda52cab557889c44e050e091d78c8f903a1a78f0754c4b08395fb72fca

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