Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c089060a6137d2a…

MALICIOUS

PDF

42.4 KB Created: 2021-05-14 09:07:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d098635450bf1ee8a4d1b26f22e40168 SHA-1: 21c287fc64e09a85a47e3dec5aa611cdcd4c1387 SHA-256: 7c089060a6137d2a563e00d6c27ce20341a90dc7018c57a138239af65b07af59
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a seed-phrase/secret-recovery lure. 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 6

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/how-to-hack-coin-master-game-without-root-game-hack PDF link annotation
    • http://aiyta.com/images/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://aiyta.com/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/free-coin-master-spins-link_GM406889139.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a5b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5B 24924 bytes
SHA-256: 441eced5afbff6b2938cc8eec7c34654d5a47241b0185574c8167174485368ae
font_01_sfnt_off0000828c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828C 18644 bytes
SHA-256: 5b0b6c654ae884b7a351bf787d45d43166c87cb8727a18cb45f58fffc41445c6

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