Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab17d63053c22e27…

MALICIOUS

PDF

35.8 KB Created: 2021-06-27 05:29:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 82de23e37dea9397452dba214b43d74c SHA-1: 5514df35e29c1d92fe53eb35647cb8d1c7d7e11b SHA-256: ab17d63053c22e2731d14158dd9b447756803f6a0e2ea78923e9b1e55577a490
142 Risk Score

Malware Insights

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

The PDF contains numerous links disguised as game-related content, such as 'Roblox' and 'Coin Master' hacks, which is a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of a large number of external links strongly indicate a malicious intent to redirect users to potentially harmful websites. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://netcdn.co/app/431946152/roblox-can-someone-hack-my-account-with-username-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/roblox-free-online-no-signing-up-or-nothing_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacker-groups-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/copy-and-past-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/oginject-co_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/play-games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-tix-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-jailbreak-hack-teleport_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-stuff-in-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-no-clickbait-2021-add_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-robuxian_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/what-roblox-games-has-no-cheating_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_off00003247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3247 22580 bytes
SHA-256: 81244249572aa7a31bbe675b71f72e22e58732af8e02042d087fe7e44a33922a
font_01_sfnt_off0000642c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 20020 bytes
SHA-256: b16866789431e48e8ba859070ea01c7875cacbf1bffb355b52d3e697dd2ccfec

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