Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f671238fe9072c7…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 07:39:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7fd321df47e104478662623f360eecfc SHA-1: 895aec5ecd10be15a0f30278cfe0b74aca8052c1 SHA-256: 4f671238fe9072c7557de879ddcdfe47e3250aa37a4ff39e9a1631dc36401bcb
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game hacks and cheats. The primary lure appears to be related to 'Coin Master' and 'Pokemon Go' hacks, directing users to potentially malicious download sites. The ML classifier strongly indicated maliciousness, and the presence of multiple game-hack lures supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/406889139/coin-master-games-hack-game-hack PDF link annotation
    • https://miraller.com/upload/files/pokemon-go-hack-free-coins_GM1094591345.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://miraller.com/upload/files/pokemon-go-free-100-iv-cp-list_GM1094591345.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-free-master_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/minecraft-images-free_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-2021_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://miraller.com/upload/files/easy-how-to-get-free-robux_GM431946152.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_004_off000052ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52CE 29984 bytes
SHA-256: 8caf49d1b4869efe4ebf80dc90a220c2b803acdb1af46b0a2d9695c14d1af6ab
font_01_sfnt_off0000901c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901C 17976 bytes
SHA-256: 4c1d26c1fb4feed8092d99a8761960172faa49b0c213e7324f16c91828cd6f14

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