Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24453d1f5003ced…

MALICIOUS

PDF

36.3 KB Created: 2021-05-21 01:19:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 35910ad554189aaa33b935cbd26a5761 SHA-1: 23424756ef36180cfc0fda917ada0a279f937544 SHA-256: a24453d1f5003ced2c9eb153a7108ea005d88644ed4b9871eabb0979b2f3f058
122 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. It uses an MFA/2FA-themed 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 0.9492

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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-spins-from-coin-master-game-hack PDF link annotation
    • https://ogm-goettingen.de/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/robuxmatchcon_GM431946152.pdfIn PDF document text
    • https://ogm-goettingen.de/images/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ogm-goettingen.de/images/free-spins-and-coins-coin-master_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_002_off00003419.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3419 25188 bytes
SHA-256: d8904a1115fc9220fe99197d7ea515d5519f4c0a6be8a3839201763497537c1c
font_01_sfnt_off00006d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D18 18148 bytes
SHA-256: a8179ab01d9f651dd6fb5ce3364ead5561884d8b40fe8a62eaf26fde05d0c646

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