Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0aabb78a472c21e…

MALICIOUS

PDF

45.3 KB Created: 2021-05-12 13:35:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b660ca27511809aa0105e91c2b957b6a SHA-1: 71a90bd6f1a82bfc2fabfd11bd53e836edf6c3f7 SHA-256: f0aabb78a472c21eb6a3f11a479da8ac8a26311fcda87b8fb62ed627a53adcd5
122 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. 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 0.9980

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.
  • 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/free-robux-gift-card-game-hack.
  • 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/free-robux-gift-card-game-hack PDF link annotation
    • http://traveltrucks.com.au/images/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://traveltrucks.com.au/images/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://traveltrucks.com.au/images/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://traveltrucks.com.au/images/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://traveltrucks.com.au/images/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://traveltrucks.com.au/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://traveltrucks.com.au/images/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://traveltrucks.com.au/images/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://traveltrucks.com.au/images/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://traveltrucks.com.au/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://traveltrucks.com.au/images/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://traveltrucks.com.au/images/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://traveltrucks.com.au/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://traveltrucks.com.au/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://traveltrucks.com.au/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://traveltrucks.com.au/images/free-robux-now_GM431946152.pdfIn PDF document text
    • http://traveltrucks.com.au/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://traveltrucks.com.au/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://traveltrucks.com.au/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://traveltrucks.com.au/images/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://robuxhaxs.comIn 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_off00004c3e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C3E 28852 bytes
SHA-256: ac2b7a7cca093a078cef1005e5c9d5e9345ea4023635211f96a8e5ddf6d5852b
font_01_sfnt_off00008de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE6 18640 bytes
SHA-256: 59f1432744b9d8cf879cb7c8a299bbbbba85d5427cd565107f85277265ec050e

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