Malicious PDF — malware analysis report

Static analysis result for SHA-256 845b47e1ca54876e…

MALICIOUS

PDF

44.0 KB Created: 2021-05-19 17:38:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e55c294c2fccc682618bd071d713d339 SHA-1: 599ab9a28b5fe2deb98d4f9cdf183e2fb6721ce1 SHA-256: 845b47e1ca54876ed6a6fefb5fa9a70c8977da041abba2e2e73759e13c26f042
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a high number of external links, many of which are SEO-optimized and point to game hack lures. The document body and extracted URLs suggest a phishing or scam attempt, likely to redirect users to malicious sites or download unwanted applications. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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.xyz/app/406889139/coin-master-hack-app-link-game-hack PDF link annotation
    • http://killebergsridsport.se/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/www-robux-us_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/win-free-robux_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/tiktok-free-download-video_GM835599320.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000483b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x483B 24952 bytes
SHA-256: fadf021c38e2195452048c020469263a198d8d1885a9e1fc42504757de345016
font_01_sfnt_off000080c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C6 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A78 17892 bytes
SHA-256: f939fda97690d6a809d743b342add8ec97984f5e978608423f32dd39679c4d64

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