Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a2be57eb838c96…

MALICIOUS

PDF

44.8 KB Created: 2021-06-09 13:48:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6ce752f4e79d3648cf4a7ee26507536c SHA-1: 803c8b6f5f42f81206ad31ddfe544f7a860dfd26 SHA-256: 48a2be57eb838c96d86345365279eb3bbe9d0135fc344b4b62001293c56868f8
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link impersonating Microsoft, promising free game items, which is a common lure for credential phishing or malware distribution. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' strongly indicates this intent. While no scripts were extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/all-free-emotes-in-roblox-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.tw/app/431946152/all-free-emotes-in-roblox-game-hack PDF link annotation
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-faces-on-roblox-names_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-roblox-studio-blocks-addon_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robuxes_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://collectrobux.coIn 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_004_off00005113.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5113 25780 bytes
SHA-256: e9526de03b1037c7dea077221d56f36a169a6a152aa3dd5cfd8fda48c3f29103
font_01_sfnt_off00008c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C51 18312 bytes
SHA-256: d305ad3bdfd6ddf42e4f4429b4ceca55245dc74b9ccbdf5e477ef244b75dab69

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