Malicious PDF — malware analysis report

Static analysis result for SHA-256 944ac56eacdf8b0b…

MALICIOUS

PDF

35.1 KB Created: 2021-07-07 17:58:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0330d1245b96b0cc588bee72db8966b4 SHA-1: 0a127fd81b931c2b8169cfd37560450064f325bb SHA-256: 944ac56eacdf8b0bd45719bfaf91039bb8944fdf66c93d82e55aa4ec682c5e0f
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/moonactive-free-spins-link-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/help-c-o-m-to-earn-free-25k-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-roblox-hack-mad-city_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/beasiest-robux-hack-in-the-world-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-cia-robux-gratis_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hey-guys-want-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/youtube-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-do-u-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-premium_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-spins-promo-code-for-coin-master_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_off00003348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3348 22620 bytes
SHA-256: f3048bcb125dfd242e4ff355e94e318b3421e5375d6346cd64139679b56c4059
font_01_sfnt_off000065f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F5 18460 bytes
SHA-256: 8e27bc3ea3f62741a2ad6ac39f6be034d140b49cb90253f8adcdccfecdbeaab1

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