Malicious PDF — malware analysis report

Static analysis result for SHA-256 04298004f69328f1…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 20:23:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: db79e3a5c0981aa592ae21376c9f63f8 SHA-1: a690ee67026b2e4603e3b4bdcca55a3803b70224 SHA-256: 04298004f69328f1a6de4449f2a8e62e6b42b644e58c0930154b30cee64d0216
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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/479516143/minecraft-windows-10-key-free-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/guess-that-song-cheat-sheet-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-roblox-promo-codes-november-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.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_off000033b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B7 23124 bytes
SHA-256: 31e705420853f6a47209847308dc33bda7ade88e1fa1f1bd316bbd687c89e18b
font_01_sfnt_off0000672e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672E 18992 bytes
SHA-256: 36861909327109810ffb4bc77f9bc8bfe79aaadac6c1a0292d1d7338432ecec1

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