Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a5db16d1ba9107…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 08:15:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3e9fcde66547c2e32c08074e89bfb2ab SHA-1: c2474e0e0f3c8ea16fb705a1fad45f37b8c22d11 SHA-256: 56a5db16d1ba910732b300b1a22771122144d0b9315bce9beadd0750f7d75517
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.tw/app/406889139/coin-master-free-spins-link-no-verification-code-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-hack-for-2021-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/my-roblox-account-was-hacked-what-do-i-do_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/android-robux-hack-download_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-super-bomb-survival-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/tiktok-free-ebooks_GM835599320.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-play-games-for-free-descarga_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/school-campus-free-roblox-uncopylocked_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-generator-the-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/black-jeans-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-earn-free-robux_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_off00003061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3061 22348 bytes
SHA-256: 1f3fd03158d96edcb2e7a3b7ea8661774a741a7769c503591c43f218221262b3
font_01_sfnt_off000061f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F8 18652 bytes
SHA-256: bdc37e9fdb84c7f9bd1cdc58a73cd6cb90efc8d1c52484062942e7f2cec54e2f

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