Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e197b205408d9f…

MALICIOUS

PDF

41.0 KB Created: 2021-05-22 23:19:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 63d5f7b0354c216e8949b6f8a8669f51 SHA-1: 0f4cb373ec2ab90ada8b35b05bcdf709cacd3aae SHA-256: 69e197b205408d9f06a22bbc93197b8a48b846ebb8ba527b0d6a5e6ce50ea111
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to malicious redirectors, specifically promoting "free generator / game hack" lures. The presence of a fake CAPTCHA heuristic indicates an attempt to trick the user into interacting with these links. The document body and heuristics suggest a social engineering attack aimed at driving traffic to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7445

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/431946152/robux-com-free-game-hack In PDF document text
    • http://solidkom.ch/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://solidkom.ch/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://solidkom.ch/images/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003110.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3110 29828 bytes
SHA-256: 4b1478f2a52456d22840b1fe0209a353423413141d1d69927619e54673d829a1
font_01_sfnt_off000074c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C2 2924 bytes
SHA-256: cde25c2c3fa73433d0c369057d6cba22c9ffd89af9c7846e743271516ebfc752
font_02_sfnt_off00007edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDC 18276 bytes
SHA-256: 15a0db03ecad41b32ad15729058012b5ee1d917146ec7af3e780186d41394abc

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