Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06d847efedd6c3d…

MALICIOUS

PDF

36.4 KB Created: 2021-05-22 20:11:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 144b7cbb26ccca95954a5b031b714596 SHA-1: 0f0e8563e0d7f6a824a0a76d13b42d11824ecd31 SHA-256: a06d847efedd6c3d4ed1cc2313a862f84314e1827f95c19b8ff48774663b6802
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, disguised as "free generator" or "game hack" lures. The primary malicious URL identified is https://netcdn.xyz/app/835599320/tiktok-follower-bot-free-game-hack. The document body also contains a call-to-action phrase, "CLICK HERE TO ACCESS TIKTOK GENERATOR", further reinforcing the deceptive nature of the lure. The presence of multiple redirector links and the ML classifier's high confidence score indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-follower-bot-free-game-hack In PDF document text
    • http://seniornetwanganui.org.nz/images/abd-roblox_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/robux-generator-no-human-verification-2021_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_off000031c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31C5 26672 bytes
SHA-256: 31226a56ca21641741de8e456447f8a279e643640a2ff82c24b0ced670522fb5
font_01_sfnt_off00006dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFA 17912 bytes
SHA-256: 36efea1239131c533f338518497dff1810050ff8e972c00fb3f35d249e370860

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