Malicious PDF — malware analysis report

Static analysis result for SHA-256 456f8d864c8ce5d3…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 16:48:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: be2dcc99785ecef419742af5d8637281 SHA-1: 33846e54eb5c5524bdad30f2aaedda1028de4791 SHA-256: 456f8d864c8ce5d3a535f16d672490321051cc3f98c79d9857af4f89b67dc389
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-hack-2021-without-verification-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-scam_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-case-code-for-arsenal-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-card-codes-no-survey_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-royale-high-school-diamond-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/infinite-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-top-model-hack_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_off0000311b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x311B 22404 bytes
SHA-256: 75cddab09d9e584e88d6f5582fdd6745a49bf9271d27f47addf07de6ec66d2b6
font_01_sfnt_off00006315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6315 19044 bytes
SHA-256: 52d7970975dbb598a786e40d700a78de5bb38af7462f02b60e72eba81c32d00d

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