Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a37956389f6df9f…

MALICIOUS

PDF

34.5 KB Created: 2021-06-18 23:32:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 972f76fe108e360828c4684888a501cb SHA-1: cdc1d3501c35aa68a0d46db146696911e41f4360 SHA-256: 5a37956389f6df9ff5d97953965e36cebcbd29e2ab3212c8999b98dba99abb10
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, which is a common lure for malicious sites. The document body and numerous extracted URLs reinforce this theme, aiming to trick users into downloading or visiting potentially harmful content. The presence of a 'password-protected archive handoff' heuristic suggests the actual payload may be encrypted, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-game-play-online-for-free-game-hack PDF link annotation
    • http://library.ulb.ac.id//repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/pokemon-lets-go-free_GM1094591345.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-robux-hack-2021-no-survey-no-password_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-account-free-with-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robux-hacking-code_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robloxgroup-cf-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-800-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-catalog-hack-script_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-lumber-tycoon-hack-money_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
font_00_sfnt_off00003069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3069 22048 bytes
SHA-256: 29665a6d8ad298d397ae6ccddfe8ee9e495e9e1244b24802d597c58896820fea
font_01_sfnt_off00006112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6112 19364 bytes
SHA-256: 05595aa8a14177835e13f68cd7effe18bce1ebc1aa6dfdce25609a0f0efec58a

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