Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b85586abd5a963…

MALICIOUS

PDF

35.7 KB Created: 2021-07-03 23:06:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3cc1e2aae3ca63f7cb97f4242074b9ca SHA-1: 7eb05496bcfe33044a231457f94d62be3001ac81 SHA-256: 65b85586abd5a9639719e1dec550f8e452481385477d7d2f9080f20a9fb9953a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are designed as link farms for game hacks and free in-game currency. The primary lure appears to be related to 'Coin Master' and 'Roblox' hacks. The document's structure and content strongly suggest it is intended to redirect users to potentially malicious sites that may host further malware or phishing content.

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/hack-xp-net-coin-master-game-hack PDF link annotation
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/10-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-instal-roblox-hack_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003260.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3260 23816 bytes
SHA-256: 4119f179e2417d39337c40cd2cb9f487deacbc6b97194c83b8ed659c2ffbad11
font_01_sfnt_off0000688c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x688C 18408 bytes
SHA-256: b3308b8a91f1ba8e8f472f4b736f4bc560ec0a61da9f358da8e6ee933f9aae69

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