Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7805f63ff0116e…

MALICIOUS

PDF

41.7 KB Created: 2021-05-17 13:25:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2553ff8b8dbbf02d7dd5d559a7ecaed3 SHA-1: f530e53b088b0ef51a1450721a69345a951ed0a2 SHA-256: dc7805f63ff0116e4447cf5b91381ecef8c04a59a5e3a5209eae82c9d64af97c
182 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 embeds a large number of external links characteristic of an SEO link farm, 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 0.9957

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-codes-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-codes-game-hack PDF link annotation
    • http://ilifemarket.ru/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/code-free-robux_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://ilifemarket.ru/images/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://ilifemarket.ru/images/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://ilifemarket.ru/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/robux-in_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/minecraft-free-download-android-apk-014-0_GM479516143.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_off00004795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4795 24384 bytes
SHA-256: 09306ba97f1a6715f30da891087bc3c4aba326370554d3da34681fa1efb0dcb2
font_01_sfnt_off00007f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F53 18640 bytes
SHA-256: ab9c735b01157041a26a1754a1ceb43d7e93b9bb6de5cba43436a791952d9cfa

Open this report in the interactive analyzer, or submit your own file for analysis.