Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f06c12a31733fdf…

MALICIOUS

PDF

40.7 KB Created: 2021-05-10 13:30:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6ae3cb95caf0c21aaee9ab3a6c9b04a2 SHA-1: efec2abe8587644a4bcb53186d51c5d66473976a SHA-256: 5f06c12a31733fdfe8d5e8494090c89d53cea965320560e4b60b9b4cfcca265c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, disguised as game hacks and generators. The document body explicitly mentions 'Get Free Spins Coin Master Link' and 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', reinforcing the lure. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9049

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/406889139/get-free-spins-coin-master-link-game-hack In PDF document text
    • https://www.quistschoenenhalsteren.nl/images/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://www.quistschoenenhalsteren.nl/images/make-your-own-minecraft-server-free_GM479516143.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_003_off000036de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36DE 26552 bytes
SHA-256: e1cef6584b6678449c3692124a4c129a33fadf034485c9fb2f6bb67725d69752
font_01_sfnt_off000073f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F4 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDE 18056 bytes
SHA-256: ab85056fbf29cd03dcfab7de7beb0343ed26656e2e8858e8ad52cb7aa31a5a92

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