Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f77d0a4f0b9ae7a…

MALICIOUS

PDF

35.4 KB Created: 2021-06-20 21:32:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 30d4e87bfe17d8bc6b2de1510e24eb94 SHA-1: cb8a61838549b2a575137c104040ac78fb532261 SHA-256: 4f77d0a4f0b9ae7a8668aeae6caf88f4a016b4b3d1285273e45d96fc6c2c349e
102 Risk Score

Malware Insights

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

This PDF document is identified as malicious by an ML classifier and contains multiple links to external sites offering game hacks and free currency. The document body and heuristics indicate a lure for users to download potentially malicious content, likely leading to further exploitation or malware delivery. The presence of numerous URLs associated with 'game hacks' and 'free robux' strongly suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/cch-ly-robux-free-ko-hack-2021-game-hack PDF link annotation
    • http://elitesoftsolutions.com/images/roblox-infinite-health-hack-2021_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-cheat-engine-bypass-august-2021_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/how-to-2021-free-robux_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-free-badges_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-hacker-report-system_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/robux-adder_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/roblox-t-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elitesoftsolutions.com/images/coin-master-shield-hack_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
font_00_sfnt_off00003132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3132 22628 bytes
SHA-256: adf2753aace9e4eccb0c9bd8bc55f3a5d534a7ac26d130a863641b2fbb29d066
font_01_sfnt_off000063b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B3 19636 bytes
SHA-256: 3565138c1f934135c921ccaf7054b9b1847e1cd41437908d79e9b8fe7df1e690

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