Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d245165624a605…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 07:54:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6cbe4ff41f87028dbac39eba1d925dc4 SHA-1: 1b84b985a5f86c71e6ef86c22f27f1ccdf068a3f SHA-256: 26d245165624a605f76c22f48ed99e41932504cb1672cd02303313d830a5350d
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 0.9865

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.online/app/431946152/roblox-zamasu-dbn-prealpha-hack-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/pubg-uc-cheap-price_GM1330123889.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/pubg-700-uc_GM1330123889.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_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
stream_004_off00004f06.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F06 26184 bytes
SHA-256: a8bd149cb063297bc91d5e388760895013baf309641b3ab5d7d37a4ef015bb65
font_01_sfnt_off00008aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA1 19340 bytes
SHA-256: 1971823a0a1b5cf381805eb4fcd06c4202a07751671dd3dd5a296338dfe6a209

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