Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e25f900c09c74c9…

MALICIOUS

PDF

45.4 KB Created: 2021-06-10 17:32:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9cd7bea461a89cf415abcb8a88dc341a SHA-1: 104b218e8789dd261be964dc6a035c6de26d3ef4 SHA-256: 8e25f900c09c74c9d60d57147792f1fd4e0f20518c3952728785459d1168fe5a
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 0.9864

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 https://netcdn.tw/app/431946152/ultimate-trolling-gui-roblox-hack-game-hack PDF link annotation
    • https://library.stikeswnpalu.ac.id/repository/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-free-shirt-creator_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-hack_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/pokemon-go-free-candy-hack_GM1094591345.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-hack-2021-working-subtitles_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-tiktok-followers-in-5-minutes_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
stream_004_off000053ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53EE 24540 bytes
SHA-256: cdefbd38620c05a1f09a80f17d76c638a10dc87dbea95bb32088be27085a5dfd
font_01_sfnt_off00008bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFF 19280 bytes
SHA-256: 50bf7e4331f37016d2145d0bab109053e144744c37b447853519fcf9ee9801ce

Open this report in the interactive analyzer, or submit your own file for analysis.