Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3ab05d273d3af5…

MALICIOUS

PDF

34.9 KB Created: 2021-06-22 09:13:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5bc90e9304575ad008a94887afdca948 SHA-1: 1dc262470c26b298f0253614023e9b1858df0329 SHA-256: 7f3ab05d273d3af5600311418930f203cf59c60450b381cc96698d60961489e7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a 'free generator' or 'game hack'. The document body explicitly mentions 'free Robux' and includes the malicious URL, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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.co/app/431946152/how-to-get-free-robux-on-mobile-easy-game-hack In PDF document text
    • http://www.nfca.org.tw/upload/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-roblox-account-dantdm_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-100-legit_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/link-for-free-spins-on-coin-master_GM406889139.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_off000030bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BD 22144 bytes
SHA-256: b59e3f66d3ed78c8543676f940e501ee83b1bef1d55c12b37f15d68eb6292314
font_01_sfnt_off000061db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DB 19556 bytes
SHA-256: 5d6ce19be76e74da427bc3d46d715c23ec8f89f5a2fa4ea427819cacabead8c4

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