Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bdddaac333215fd…

MALICIOUS

PDF

36.7 KB Created: 2021-05-21 02:46:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1e528c5656dac59bb8218e175211f27d SHA-1: f38c0d35907b4cd8e104af857f6b29313d1607e3 SHA-256: 1bdddaac333215fdf1a5ad53316e8658d9480c2125363238ce7fd2eb2376a40a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors disguised as game hack generators and download pages. The document body explicitly mentions "Free Custom Minecraft Skins" and includes a "CLICK HERE TO ACCESS MINECRAFT GENERATOR" call to action, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/free-custom-minecraft-skins-game-hack In PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.freenom.comHeyIn 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
font_00_sfnt_off000035d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35D6 25116 bytes
SHA-256: f2b38259bca65526d757719e8b9403fe2082da3571eabdffe3a9d62ada31585e
font_01_sfnt_off00006e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E62 18280 bytes
SHA-256: ec10c50983ae4d489d577a547491e9239078f829f0002f8f667bd43cad21040b

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