Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5182ad206e28b4…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 07:46:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7e5a0d2c7f50c52f637605ee4334b779 SHA-1: 2a57f5d76c6ec904aa4fcf64f2a913da29fea521 SHA-256: 7d5182ad206e28b4694b3a47c48b5d00100584c347cdd1920cb5cbff106297a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, one of which, http://netcdn.tw/app/431946152/robux-for-kids-game-hack, is identified as a malicious redirector. The document body and heuristics suggest a lure for game-related cheats or currency, indicating a phishing or scam attempt. No scripts were extracted, but the presence of malicious links points to 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/431946152/robux-for-kids-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-have-free-skin-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-tr-808-vst-free_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-noclip-2021-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-inspection-hack_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/tiktok-hearts-free-2021_GM835599320.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/spend-free-robux-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-mocap-animations-free_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-free-gift-card_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
font_00_sfnt_off000031b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B2 22820 bytes
SHA-256: 380d7cbf007eccc522e58ad1177210ded1555e18acaf5ea9be3dc7bcbf963231
font_01_sfnt_off000064a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A1 19012 bytes
SHA-256: 8020a23b7ddb9411bf645835d14aa85f4a72b1b9a4a728149e9f7b12692e21b9

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