Malicious PDF — malware analysis report

Static analysis result for SHA-256 a678d555ac03413d…

MALICIOUS

PDF

45.8 KB Created: 2021-06-11 02:34:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d7bc7ef0d9f9debc94fd393b045ae9ca SHA-1: abba26dbaa3c07dc384dbed930c490a552e774a8 SHA-256: a678d555ac03413de598d01343ac75a4b7f7b6a79be6acc306d3d0a7929e4364
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. 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 0.9864

Heuristics 4

  • 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.tw/app/431946152/a-free-game-of-roblox-game-hack PDF link annotation
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-roblox-accounts-dump_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-by-watching-ads_GM431946152.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_off00005040.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5040 28420 bytes
SHA-256: a6b722e197b0605d2ae24fcaadffae3b4ef655c693c9064c881a55e3e94f5040
font_01_sfnt_off00009039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9039 18436 bytes
SHA-256: e2aef57822e0c895864108b5d3ecace9f192469910132e8236e3efdd7b5892ac

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