Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f83a7aa60802e9e…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 23:04:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ce8e66fe8b267d8d48fcc88ea8998b03 SHA-1: 1e0a6150872ae116a3328ef4185388d3616b813d SHA-256: 7f83a7aa60802e9edf9047a7703a5d1d726f1d1407b27a1aa26ec7abc27a4bae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, designed to lure users into clicking on offers for free in-game currency. The primary malicious link is http://netcdn.tw/app/406889139/free-coin-master-coins-game-hack, which is likely part of a phishing or scam campaign. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-coin-master-coins-game-hack In PDF document text
    • https://www.studio-dentistico-fiume.com/files/2021-pastebin-free-robux_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/how-to-get-games-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-robux-no-survey-no-human-verification-and-no-download_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-catalog-clothing-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/how-to-hack-and-get-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-hack-roblox-for-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/pokemon-go-free-redeem-codes_GM1094591345.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-minecraft-account-and-password-2021_GM479516143.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
font_00_sfnt_off000030ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CA 23060 bytes
SHA-256: 183b010d5cb1ccb26181b26ed4154e13ae55f1c46fb0dca8b49829ba4b4932bf
font_01_sfnt_off0000649d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649D 17996 bytes
SHA-256: e3fb1ca426c01543f38f1d1129ae452bef28a40365fbe99abf1b239340e30419

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