Malicious PDF — malware analysis report

Static analysis result for SHA-256 605a915696a4ef7c…

MALICIOUS

PDF

43.3 KB Created: 2021-05-19 17:33:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c89df1b149bace4c445b3275b8d4fdba SHA-1: ef459083c4116502cf04a887726f0a77c312d579 SHA-256: 605a915696a4ef7c2b1a783a3a0a42a3790d84ba2b2cdbb84d86d53ca1f79c84
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 0.9969

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/free-spin-coin-master-link-2021-game-hack PDF link annotation
    • http://montchanintt.fr/images/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://montchanintt.fr/images/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://montchanintt.fr/images/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://montchanintt.fr/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://montchanintt.fr/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://montchanintt.fr/images/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/abd-roblox_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://montchanintt.fr/images/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://montchanintt.fr/images/get-free-spins-coin-master-october-2021_GM406889139.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_off00004aaa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAA 25644 bytes
SHA-256: 05bcb857b58424991ed328218ae24140531dbdda37b02f84b879db54503047b3
font_01_sfnt_off00008653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8653 18456 bytes
SHA-256: e9900cc34792e9e10189734f2c0a95be85fa7d2c8d6cb23872c5da80ce816735

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