Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a233db5f044ae9…

MALICIOUS

PDF

43.3 KB Created: 2021-06-11 13:22:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f13c8ec704708399af1561e144f63ac2 SHA-1: 871b21094566cff0b5f1bcee4b526797ac38d954 SHA-256: 30a233db5f044ae91e9b6b85b51b39ad314958888b13d8ea041cedbac5b5de49
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users to external websites, including a known malicious redirector. The primary link directs users to a 'game hack' generator, suggesting a social engineering tactic to trick users into visiting potentially harmful sites. The presence of numerous SEO-optimized PDF links further indicates an attempt to drive traffic to these malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/id-that-hack-roblox-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-cheats-deutsch_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-no-apps-needed_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-rpg-games-to-steal-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/codes-for-free-stuff-ib-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-new-cards-hack_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_004_off00004cf6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CF6 24468 bytes
SHA-256: cff99dea7d2b061603ecbfef63a06c2db10492b43c56110a0f6b7ecd6eb010f6
font_01_sfnt_off00008533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8533 18624 bytes
SHA-256: 80b53359bec45bf5a51e0b3dc933b519c5b911c8c91f522079cae38b95d9f7f3

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