Malicious PDF — malware analysis report

Static analysis result for SHA-256 9739fde6cc74ba75…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 15:11:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5cf5145278aea3a9fd0e1482682d3906 SHA-1: d21c6b61b5acabd3a0083f9e0cc476fbff2dee6b SHA-256: 9739fde6cc74ba750bb484aecd36db6331c997b880d5223dae354217c0f27721
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free robux' to lure users. The primary redirector URL is http://netcdn.tw/app/406889139/coin-master-34-6-hack-game-hack, which is designed to lead users to potentially harmful content or further malicious sites. The document's structure and embedded links strongly suggest a phishing or scam attempt.

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.tw/app/406889139/coin-master-34-6-hack-game-hack In PDF document text
    • http://tasleemdubai.com/userfiles/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/robux-hack-no-download-2021_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/seven-roblox-hack_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-clothes-with-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-sword-fight-on-the-heights-hack_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-codes-no-download_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-do-i-get-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_002_off00002ffa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FFA 23308 bytes
SHA-256: ed65820abe52b4ee1f0ba689906a07c2edd8d29a9a49af1f9a5e56025f74c0c4
font_01_sfnt_off00006486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6486 18408 bytes
SHA-256: 771a2c558fbd10cbfd7734f1954a2b8d2b1d40b927f150a26b434975924ea7dc

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