Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d07c2161f829017…

MALICIOUS

PDF

39.1 KB Created: 2021-05-10 13:50:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3ade6cea040cc54f966e9f39c5da3dfa SHA-1: 775b5e0783169d85c7e4b9a712894a3588cf0354 SHA-256: 3d07c2161f8290175c1fb91f7f623922143a39fb1c2afc81aca9e521d5183724
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 brand-impersonation credential phishing and a callback-phone (TOAD) 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 0.9460

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/https-rbx-place-rewards-game-hack.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/https-rbx-place-rewards-game-hack PDF link annotation
    • http://fmbompastor.com.br/images/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/robloxmatchcom-free-robux_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_off00003a18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3A18 26408 bytes
SHA-256: 1bcb9f199d5b9c82e2683d04bea2721ac9d2b772a28046ce1cfbc9fe4caef1b1
font_01_sfnt_off000075bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75BC 18640 bytes
SHA-256: adbb92b042532d7f987745dbbe30e528a9aa5ccea6c943b93cd0d8aa572e92fd

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