Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4d106893e5ad20…

MALICIOUS

PDF

42.1 KB Created: 2021-05-18 02:33:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0d8ab35c6ebec09afff73476014b4902 SHA-1: 2ba38b21add9a17a3b8280500d2930f44a0f4051 SHA-256: 8e4d106893e5ad204cebeadac07c8ac45a12fa20770f74d00d52bdef123925eb
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are part of a link farm designed to lure users with promises of game hacks and free currency. The primary redirector URL, https://netcdn.xyz/app/406889139/free-coin-master-spin-app-game-hack, is flagged as malicious. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • 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.
  • 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/free-coin-master-spin-app-game-hack In PDF document text
    • http://geometraperiotto.it/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/mcpe-116_GM479516143.pdfIn PDF document text
    • http://geometraperiotto.it/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/coin-master-support_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/free-roebucks_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://geometraperiotto.it/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/how-do-you-get-free-food-on-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
stream_003_off00004afe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AFE 25136 bytes
SHA-256: c090cb3a92e7440748694842ba76e383c08b4cd1a30c876747c376c407abde5b
font_01_sfnt_off0000838b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x838B 17884 bytes
SHA-256: 6a5fc0e5ee3990f98fff047e5d02c1443490e61ce795861dff478bab25fb071a

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