Malicious PDF — malware analysis report

Static analysis result for SHA-256 c838c2e5f13b713a…

MALICIOUS

PDF

43.0 KB Created: 2021-05-12 19:05:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6002614f029b407449f204290b299277 SHA-1: 8ea1a8b95ce3315697943d3e7cd917186dfc9507 SHA-256: c838c2e5f13b713a048fcad156a2235968ea72ae9cc6756e5f384af23ce32700
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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

  • 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/coin-master-hack-version-ios-game-hack PDF link annotation
    • https://heimatverein-oberlangen.de/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/what-is-robux_GM431946152.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://heimatverein-oberlangen.de/images/minecraft-hacked-client_GM479516143.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_off00004cbc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CBC 25528 bytes
SHA-256: 68b5b961c4215997c56b65c5bfcdd3aafdd7ea077f6292ea05048955382c58d5
font_01_sfnt_off0000870b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870B 17848 bytes
SHA-256: 849319ab9256530e782e8f71c1ec5ce64162b8af72e859679b1a010bfb2d37d8

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