Malicious PDF — malware analysis report

Static analysis result for SHA-256 603f4d49b7cc7ecf…

MALICIOUS

PDF

41.2 KB Created: 2021-05-12 14:03:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: af1d81b3eaa11899dcf63bfc06d1a200 SHA-1: 52c482dc190db58ee9ac65b5f6776495493ae0ca SHA-256: 603f4d49b7cc7ecf8f4afd251b5371fd691ae76a94122a81ce2979f7b82b7cf2
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links to external websites, many of which are disguised as game cheats or generators for popular games like Coin Master and Roblox. The presence of brand impersonation for Facebook and the call-to-action phrases suggest a credential phishing attempt or a lure to download further malicious content. The ML classifier strongly flagged this PDF as malicious, and the link farm heuristic indicates a large number of potentially harmful external references.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • 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/406889139/hackear-coin-master-sin-root-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/406889139/hackear-coin-master-sin-root-game-hack PDF link annotation
    • http://repository.unla.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004933.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4933 24204 bytes
SHA-256: 05b7ccb536dfa771c7c6294028f5c4256ce35dfbbc09f23123d3afbf07616fd6
font_01_sfnt_off0000805c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x805C 17716 bytes
SHA-256: f8689f1783c870fa0771497041e7577d4712db894208691d27bb372dff2a265b

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