Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2d542d856a8a11…

MALICIOUS

PDF

37.7 KB Created: 2021-05-22 05:11:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: df16ea9ba2c71f04496378f82b060d27 SHA-1: e4178489c34e000f625748be5c5c705a8af4e194 SHA-256: fc2d542d856a8a1141d362676a099ae156b138e29562bfbbd5b70eea73afed3e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' and 'free views' lures. These links are designed to trick users into downloading further malicious content or visiting compromised sites. The ML classifier also flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

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-free-views-game-hack In PDF document text
    • https://www.yantan.com.tw/upload/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/apps-that-give-you-free-robux_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_002_off00002fbb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FBB 24952 bytes
SHA-256: 9deb5493069329b3b8825ecac5cf4dd3496484672c29b58cc481795ab9475c79
font_01_sfnt_off0000694c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694C 2892 bytes
SHA-256: 5e0712ca08337fb3b2e5736ec787a8b2ab1b9b6f3706f0b029d23afe08e6a7a6
font_02_sfnt_off00007331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7331 17752 bytes
SHA-256: c0458c8281c5f614ec80a73af60f82da894f7f0cb4b38fcd4688d4eb1216e853

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