Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ee422b37a151db…

MALICIOUS

PDF

45.1 KB Created: 2021-06-04 02:26:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ec5348a109faf5ede16555209c94bf25 SHA-1: dde6e8fd4f846d7034ea0bd6d8edeafd945e9411 SHA-256: 22ee422b37a151db3a2ccf2a5fb35c3d7ca944b9b1f9462cbc50324563db1bf7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free generators'. The document body, though partially corrupted, contains a prominent URL matching the malicious redirector. The presence of these links and the ML classification strongly indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/free-spin-link-for-coin-master-game-game-hack In PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/pokemon-go-free-hack-ios_GM1094591345.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-without-verification_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_off0000544a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x544A 25496 bytes
SHA-256: ddc3796da93aa33f1a15243430ae72aa6dd9ec8fc9557c8d18d26668aace6640
font_01_sfnt_off00008df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF8 18316 bytes
SHA-256: 4ad106dc66915d7a7c54c506e35e2e74cb7406920644c521a55874c4c44ea7c2

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