Malicious PDF — malware analysis report

Static analysis result for SHA-256 945b163dda5c558e…

MALICIOUS

PDF

40.8 KB Created: 2021-05-12 11:31:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2052c4436ccc89de5c243eadf7a11402 SHA-1: cb72560bdb96c2266973158c20a5952c03e743ae SHA-256: 945b163dda5c558ede9d3cb39ecad1450ea3700bdeed3a0fcbac0338e90fd1eb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, one of which, https://netcdn.xyz/app/431946152/free-robux-place-game-hack, is identified as a malicious redirector. The document body and heuristics suggest a lure for game-related cheats or currency, aiming to trick users into visiting the malicious URL. No scripts were extracted, but the presence of multiple malicious links indicates a high likelihood of a phishing or scam attempt.

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/431946152/free-robux-place-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-18_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.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
stream_003_off000046d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46D7 23744 bytes
SHA-256: a984b58e88f45a833e750c6c0a950aea3cde33a659e90fe9954ddba7467f7d2e
font_01_sfnt_off00007c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8B 18472 bytes
SHA-256: a8315d3de564ce67f995c8887965c7d9f34366905f839248eafe88b792a59691

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