Malicious PDF — malware analysis report

Static analysis result for SHA-256 596cd634641cf83b…

MALICIOUS

PDF

43.7 KB Created: 2021-05-17 18:19:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 32ae1fe5679c5767a41552e9dec2dfae SHA-1: b006eb0634cf89a36d6021390e9bd101bdda2075 SHA-256: 596cd634641cf83b3a150748d7f2d49d90040ebd1532a9d9b767f746c3511fc5
200 Risk Score

Malware Insights

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

This PDF document employs social engineering tactics by presenting a fake CAPTCHA or human verification prompt, alongside links to 'free generators' and 'game hacks'. The embedded links, such as https://netcdn.xyz/app/406889139/coin-master-free-spins-and-coins-haktuts-game-hack, are associated with malicious redirector infrastructure. The document's primary goal appears to be tricking users into clicking these links, which likely leads to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-free-spins-and-coins-haktuts-game-hack In PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/xray-hack_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-demon_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coin-monster_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/minecraft-account-hacked_GM479516143.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_off00004a05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A05 27832 bytes
SHA-256: d910675acb77da6a664c306aa4fcd76be79100038a558cb2639b728098167c37
font_01_sfnt_off0000885e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885E 18372 bytes
SHA-256: 1374fd06713d40a81e458f274f3407aece0ce4f3746b7111d66dc7260bac3a40

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