Malicious PDF — malware analysis report

Static analysis result for SHA-256 919357a8bc42be2b…

MALICIOUS

PDF

34.6 KB Created: 2021-06-27 23:28:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 38bfffcf69c89414b3ff8a3ca0d85d95 SHA-1: 14d276b386b528e3874111561768b5e0ec3f6be5 SHA-256: 919357a8bc42be2b70713040e814c74f74a19e229a99267502e4dd9318ffe30a
142 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. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9980

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-item-finder-hack-game-hack PDF link annotation
    • http://library.stiks-tarakanita.ac.id/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-how-to-get-a-group-for-free_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-hack-de-robux-version-2335202112_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-do-you-get-free-robux-on-roblox-wihtout-paying_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-zone-hack_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-cheat-in-roblox-mad-city_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/comment-hacke-roblox-robux-pc_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/tiktok-free-or-paid_GM835599320.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_off00002f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F79 22188 bytes
SHA-256: 987c3ace55435bdda6bfe46f3a66bb6ad5ecb65ae3ebde758e1b2494227daaa7
font_01_sfnt_off000060d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D1 19476 bytes
SHA-256: 96f25317fa7f4ca8d1ded2bd9b68be7bcf5162245a5a866bdb9768cb12b5759c

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