Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7eecf3fc9856928…

MALICIOUS

PDF

37.6 KB Created: 2021-05-10 16:30:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a6a02ca9febb874d5492db20c6163748 SHA-1: cff53ea6bf2585864a48282894e9bf4a941d54d6 SHA-256: d7eecf3fc985692804022f6e4ee4d18cc7a4c1cdeba5fbf9576bd189ef727497
102 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 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 0.9423

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.
  • 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/robux-websites-2021-game-hack PDF link annotation
    • https://www.fenews.co.uk/images/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.fenews.co.uk/images/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.fenews.co.uk/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.fenews.co.uk/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://www.fenews.co.uk/images/blogspot-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_003_off00003757.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3757 24672 bytes
SHA-256: 9c8a9e351e4b42d019012b5f0b7dd2641d2e8457d52fa641396864dbfd8bb47c
font_01_sfnt_off00006fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE8 18676 bytes
SHA-256: 8e35f60a006eed5ffc493481045aa1980878ced5d77eb8f37738a10bc05aa5ba

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