Malicious PDF — malware analysis report

Static analysis result for SHA-256 78afb54872933c52…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 08:50:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5031a1774bf905f6e900390cda9cafcf SHA-1: 38f53164d14ffe257f1e094e7fa9fa83086654c7 SHA-256: 78afb54872933c528dab59777cad761db39379d8f02f3c62e9aae4be209d8289
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive 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 0.9865

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/406889139/master-coin-free-link-game-hack PDF link annotation
    • http://library-fkip.uho.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-tiktok-like_GM835599320.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/without-pokemon-go-free-account_GM1094591345.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/pokemon-go-free-quagsire_GM1094591345.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_004_off00004e85.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E85 25004 bytes
SHA-256: e5ac12fa35b2544dc08fc00cb718a54e50e4dd81d12ade72eaa58eb23b0dfd23
font_01_sfnt_off00008758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8758 17880 bytes
SHA-256: f325bc51a5f33ec2ea6c889aa635c0e4104002a1859551a05fb0fcec2a10294b

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