Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ae58c97428165b…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 07:43:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3767acd0f0a798b61b4ee4b37ff23b3f SHA-1: ddc9dc69420bd6005a9a317d4c6ad70d82caad12 SHA-256: 49ae58c97428165b2e8de2043c2f8ed4ba15cf2977dfbd2db2e9921c1b5ebbef
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 4

  • 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/coin-master-free-spin-bonus-game-hack PDF link annotation
    • http://www.valenciamaids.com/userfiles/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-sell-a-shirt-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/robux-only_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/tiktok-free-likes-app_GM835599320.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-do-u-get-free-robux-code_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-but_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-coin-and-spin-for-coin-master_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
font_00_sfnt_off00003066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3066 22528 bytes
SHA-256: bac07f131b41b5fd581e1f33f9b9d3d55669aa367f2674c4a73920a4068b3468
font_01_sfnt_off00006290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6290 18532 bytes
SHA-256: cf1e246601eea942372bc34199523b5fc19dc03bf6217937d361a70e9348a69d

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