Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1056a1d31bd3b75…

MALICIOUS

PDF

40.5 KB Created: 2021-05-11 04:45:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a7d93ec076708106f77588050fe30d5f SHA-1: ece5edfb99155277120a27ec667f60cb17523f77 SHA-256: d1056a1d31bd3b7517bfb3fa2b2bbe5fd416635ceede7e9a265101b2afd2c20f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "game hacks" and "free generators". The primary lure URL is https://netcdn.xyz/app/406889139/pasos-para-hackear-coins-master-game-hack. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious link redirection, likely intended to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/pasos-para-hackear-coins-master-game-hack In PDF document text
    • http://centr-expert.su/images/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/robloxhacks_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/robux-adder_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/how-to-get-roblox-premium-for-free-2021_GM431946152.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_off00004771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4771 23792 bytes
SHA-256: bea0a9d1b4b7e1a846d43988c1beb290224d77e7b2d6065d7ffdbf7f768111db
font_01_sfnt_off00007d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D09 17868 bytes
SHA-256: 59162798968571b58eab4ea002b9aaa75bdfc5001cc9a37297d5f6ee37b3b3bc

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