Malicious PDF — malware analysis report

Static analysis result for SHA-256 248a2d189ae1feab…

MALICIOUS

PDF

41.9 KB Created: 2021-05-12 04:45:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2020535d29a0d33f7263c878bf654a94 SHA-1: 050dcc9840bc71543e47e8e6d0be2291527273f9 SHA-256: 248a2d189ae1feabe130b9151d29d1cd76f48bc6979c1161083757ef98f86cee
142 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 a seed-phrase/secret-recovery lure. 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 0.9971

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • 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/best-site-for-free-coin-master-free-spins-game-hack PDF link annotation
    • http://pspmrsmbpulau.com/opac/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/mcpe-hacks_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/coin-master-free-spins-hack-2021_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
stream_003_off00004802.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4802 25136 bytes
SHA-256: a4b226b52283148e15b2e5a8ac7c0294ee27c19f3dd3aa613b1761f44dcbc1c9
font_01_sfnt_off000081cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CC 18104 bytes
SHA-256: 879ff18a357a82badab2459f221a11f7b700cc3f508e85be5618259a1268201a

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