Malicious PDF — malware analysis report

Static analysis result for SHA-256 733ff5bdb90f6f31…

MALICIOUS

PDF

42.4 KB Created: 2021-05-18 03:13:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7ff806d43f9b50622f811d96b62f7c33 SHA-1: 20d6fa206c5f80df7369cac1da891e9a2a063e5a SHA-256: 733ff5bdb90f6f3155bd10ee7ed94c3a73a9e4af922852e0b7376061b8f256ad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, disguised as 'free generators' or 'game hacks'. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a call-to-action button suggests a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and linked content point to a lure for potentially harmful downloads or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/minecraft-realms-free-codes-game-hack In PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/wurst-minecraft_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a99.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A99 25016 bytes
SHA-256: 068c7bcc27323235e7853eb955b597f78ea90c7f405230225cb3d1c313c5e4f1
font_01_sfnt_off00008397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8397 18216 bytes
SHA-256: 30a8f83054e231b1bb485b1ca025b33fda8ee43bcea67b958af1de796f39c45f

Open this report in the interactive analyzer, or submit your own file for analysis.