Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44259fbfe2dbdf6…

MALICIOUS

PDF

34.7 KB Created: 2021-06-28 03:04:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 322c1702760b6ce6d22be677d7f4d70d SHA-1: 730a27cce600289f6ee6127558bffde4ca581011 SHA-256: d44259fbfe2dbdf631dc54dfcbb1be6e6efba7de22a93beda2fc7043d357c9cc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox and Coin Master. The primary redirector URL is http://netcdn.co/app/431946152/roblox-play-store-free-download-game-hack, which leads to further download links hosted on tena-g.hr. This pattern is indicative of a lure to download potentially unwanted or malicious software, often distributed via phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-play-store-free-download-game-hack In PDF document text
    • https://www.tena-g.hr/files/script-executor-for-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-hack-tool-2021_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/robux-card-codes-for-free_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-hack-roblox-accounts-with-edit-this-cookie-2021_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/earn-free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-free-spin-reward-links_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
font_00_sfnt_off00002e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E70 22452 bytes
SHA-256: b0ac98a16ab56c0a3b110d975154ba44885b7b6747f7ea7c00f79483609783f9
font_01_sfnt_off000060a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A0 19596 bytes
SHA-256: 7d094f43c3ac914ab57481be52683efbf395c873e35d982ff8986a2a0b99a332

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