Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b7123b13725022…

MALICIOUS

PDF

48.7 KB Created: 2021-06-08 18:01:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d93142f714372168ed9a1dc41728c52c SHA-1: 8fc1ba6f1a49c69b6a1016eed90967093d5bd644 SHA-256: c9b7123b1372502227293aa1b94870cae6630be6edf3103884250cf9aeb9984d
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 0.9796

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.tw/app/431946152/camping-2-hacks-roblox-game-hack PDF link annotation
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/20210-robux_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/main/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-33-hack-version-download_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005152.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5152 25460 bytes
SHA-256: 4efe29f9edd7c172e30d3d7c96e0e768a73bdc2d986dde058d4fcbfe83a43942
font_01_sfnt_off00008c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C10 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9922 19148 bytes
SHA-256: 309d16101ed6ff44d01fdb00c32871b0e7e65d64ce19c6e62c32523f63ff0284

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