Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e55cd67776d18c…

MALICIOUS

PDF

42.0 KB Created: 2021-05-13 14:00:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 00f31a1432bb07f299e9284b359da5d8 SHA-1: b8f3c135290d662818090a97a0ee5756c41d590d SHA-256: 29e55cd67776d18c51216c5ed4d8bdff522f7f250af5517a534c5e86b089fe0e
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/coin-master-spin-hack-2021-game-hack PDF link annotation
    • http://ordineavvocatitempio.it/images/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://ordineavvocatitempio.it/images/how-to-get-free-roebucks-without-verification_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_003_off000048b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B0 25552 bytes
SHA-256: 93c205559dd2595eaedefaf7f2b2cc73389c3c0ccbaa676179aa6c88c99b7d18
font_01_sfnt_off000081b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B7 18296 bytes
SHA-256: eaa60ab3b9dbdc46d7aef4d77b4227c1d0aeb4180c3635ae77be6ae4ebf58c24

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