Malicious PDF — malware analysis report

Static analysis result for SHA-256 efbc77153fdaa22e…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 12:25:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7a726c89d2b0226d99c19f6375829812 SHA-1: 1722179562f95875d42360766e14d6e33be9a4ba SHA-256: efbc77153fdaa22e5c9fb9b7eeb876ed9fd739e0f7dfce0f09b161e7cd7873f6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a known malicious redirector infrastructure, disguised as a "free generator / game hack". The document body and heuristics indicate a lure for potentially unwanted or malicious content. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/coin-master-free-2021-spin-link-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-spin-cheat_GM406889139.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_004_off000052f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F5 23976 bytes
SHA-256: 0252d331208c74d14cc1f3ce3e7bdb40bf2346ae43c6b817a18e1e07196b5835
font_01_sfnt_off00008968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8968 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off0000931b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x931B 18456 bytes
SHA-256: b7ae3d16bb028351929840db057611194e7c02105e6dbd3e36d0326cc4cd0414

Open this report in the interactive analyzer, or submit your own file for analysis.