Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7a816a891e5d95…

MALICIOUS

PDF

41.2 KB Created: 2021-05-24 05:40:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d8ccdfdf383612ff2d911058064cec3d SHA-1: c88de7434be06dde3b32c207b38bc4fc00388028 SHA-256: ed7a816a891e5d9557278e4359abe635976f8da5f3d56e6daeb473732093df2e
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, including one that promises a 'free game hack' or 'generator'. The document body also contains a call-to-action phrase 'CLICK HERE TO ACCESS TIKTOK GENERATOR', reinforcing the lure. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves tricking the user into clicking a malicious link, likely leading to further malware download or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8308

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/835599320/tiktok-like-bot-free-game-hack In PDF document text
    • http://cadcam.no/images/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://cadcam.no/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://cadcam.no/images/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://cadcam.no/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://cadcam.no/images/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003157.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3157 25232 bytes
SHA-256: ea5c2b2fa5c3c9f070d9749e8f18d51c04cffdec1de4920722417372b40a8888
font_01_sfnt_off00006a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2B 3488 bytes
SHA-256: 9db63b5e0012def1bfc3325c2af0706bd15e9b2e9a3a82c82b20a0b4ab719279
font_02_sfnt_off00007611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7611 3120 bytes
SHA-256: 49734f51977507cba6bc8d3ad0cee0363aa119856db094427deb9cf565bb7bca
font_03_sfnt_off00008124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8124 17672 bytes
SHA-256: 4586a179c1ee4dcb7242a6ebe5d9b9be55f6b3291c614cdd8b5fef0fe9e318cf

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