Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb720c0e2dc29559…

MALICIOUS

PDF

40.1 KB Created: 2021-05-10 15:36:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 55984703ac69ad6747012aebeef968b6 SHA-1: 6a0f82eaec7838b9c49533603e0643b2f02ab0c2 SHA-256: bb720c0e2dc29559192080f6a118e51ae7cb530275e4bab7159e053119619a22
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 0.9945

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/how-to-get-free-spins-on-coin-master-game-game-hack PDF link annotation
    • http://sdsdar.org/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://sdsdar.org/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://sdsdar.org/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://sdsdar.org/images/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://sdsdar.org/images/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://sdsdar.org/images/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sdsdar.org/images/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://sdsdar.org/images/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://sdsdar.org/images/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://sdsdar.org/images/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://sdsdar.org/images/free-robux-easy_GM431946152.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_off00004255.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4255 24620 bytes
SHA-256: 406f397566d5a032b7ba8ef7da8e2a623406846483604248ef0aa154f25e44c8
font_01_sfnt_off00007abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABC 18308 bytes
SHA-256: 10163bb99b7c52850725d3517fa904ee973029f2387d51d5c8df1a27f3218e6c

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