Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dcb1a874f79fd4e…

MALICIOUS

PDF

48.0 KB Created: 2021-05-16 20:38:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7c9363bdd23f8c3fdfa8c2e86452c0b3 SHA-1: b279c76784cd14c14a032f6a5aebb9ed5e82751c SHA-256: 3dcb1a874f79fd4ef4fab44efb06879a3d90aea0e4947382141b7509b86188c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically advertising free game currency or hacks. The document body, though heavily obfuscated, contains a URL that aligns with these findings. The presence of these malicious links and the ML classifier's high confidence score indicate a high likelihood of this document being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/431946152/rbxfree-com-free-robux-game-hack In PDF document text
    • http://soma.com.ua/images/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://soma.com.ua/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/krnl-download_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/win-free-robux_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://soma.com.ua/images/free-roblox-hack_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C5 28476 bytes
SHA-256: 1a2a033298d00b82be68076e410d1afe09dfc086f9d88887e22ca5ee201898f9
font_01_sfnt_off0000895c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x895C 6768 bytes
SHA-256: fa93de321190668b294ff46149e4b98ac349b4fd022dcee9ecd964f7f59f3f9a
font_02_sfnt_off0000999b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x999B 18276 bytes
SHA-256: 3458f47f0b0e4c5d178391a23bbf01d917f000ba7933fbc297d15d2e5240f022

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