Malicious PDF — malware analysis report

Static analysis result for SHA-256 952e1c49838efbfb…

MALICIOUS

PDF

45.7 KB Created: 2021-06-11 12:01:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7b7903cd6ade58fdb26944d631819670 SHA-1: 3e849373a727faa008013cd501b5596d0ff3fb9b SHA-256: 952e1c49838efbfb2170c841aa009e4e3a793615f7de7c64c8b13a2f4d5a5454
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as a game hack or generator. The heuristic firings indicate this is a lure for credential phishing, specifically impersonating Walmart. While no scripts were extracted, the embedded URLs and redirection behavior strongly suggest the document is designed to lead the user to a site that will likely attempt to exploit vulnerabilities or trick them into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/notoriety-roblox-loot-bag-cheat-game-hack.
  • 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/notoriety-roblox-loot-bag-cheat-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-anime-cross-2-hack-money_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/doe-roblox-hacks-work_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-hair-in-roblox-girl_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-rust-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-teleport-script-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-coin-master-coins-and-spins_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_off000052d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D3 25404 bytes
SHA-256: ad654d1ad1fb7c60e862eb8f0e09678ffb380c8a8d745759000d2e55f1726242
font_01_sfnt_off00008e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E17 18872 bytes
SHA-256: fcb3250cbabf0cc7619d409782b49f17c28b78fbafea4b2b787c39f999eeea8c

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