Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69f42f4f410ab55…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 07:00:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 60cae4ef31c9f90a877a976b6f8c0113 SHA-1: 4672f828dba74c1ed30644b8fd4fc6cccb77fb6a SHA-256: d69f42f4f410ab550af0cc1e069d5c36c172616e4195249e3ca0d73f0280ffd5
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/479516143/minecraft-114-4-download-free-game-hack PDF link annotation
    • https://pustaka.mic.sch.id//repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/pubg-uc-xtrcom_GM1330123889.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-get-free-robux-without-information_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robloxheroxyz-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
stream_004_off000053e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53E8 24812 bytes
SHA-256: 8ddc06ebdb449c8729c1ffbb38730073cc51a1d35687c4b22185e5737c0d0358
font_01_sfnt_off00008c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3F 18460 bytes
SHA-256: 75da8b51a47d17c53cef458c32f572c9279d812ac5551097a23a7eac0e8ee719

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