Malicious PDF — malware analysis report

Static analysis result for SHA-256 c55f279ea144ec3b…

MALICIOUS

PDF

46.5 KB Created: 2021-06-09 12:39:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fa511f9a7ba2115d7d46cdd00f025081 SHA-1: abc8e6ab60d908c7f0743c66e032e07cb3113d89 SHA-256: c55f279ea144ec3ba97460a28321cc569cec77d70aee3141fad17e847624470b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9832

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/free-robux-without-human-verification-or-survey-2021-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/pubg-uc-ykleme-hile_GM1330123889.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-the-egg-in-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-ninja-animation-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/instalation-cheat-strucid-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/robux-survey_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_off000054b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54B4 25024 bytes
SHA-256: f4d39975b29aaf2258c782585e2a912d8b46e87736247f6fd3d1df1be9d2ed9e
font_01_sfnt_off00008e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E63 19920 bytes
SHA-256: 2630e5c93654023b5d56972aad808fa206a8ed8d9601af9b085ff36f8c7b2ba1

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