Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab76e5c633aba8b…

MALICIOUS

PDF

40.5 KB Created: 2021-04-29 06:39:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: df9b7ecb2c566f69501b7b685e7f22a7 SHA-1: 39f4a10901231f971828c1c9a1b6bdbecca186c2 SHA-256: 8ab76e5c633aba8be1315ae101935971039c0d94fe54eab693e64a1acb647791
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

The PDF document contains multiple links to known malicious redirectors and impersonates Facebook to lure users into clicking on a "Roblox Robux New Hack" generator. The document body explicitly contains the URL "https://netcdn.xyz/app/431946152/roblox-robux-new-hack-game-hack" and a call to action to "CLICK HERE TO ACCESS ROBLOX GENERATOR". This strongly suggests a credential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.xyz/app/431946152/roblox-robux-new-hack-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.xyz/app/431946152/roblox-robux-new-hack-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-hacked-apk-add-unlimited-money.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hack-roblox-all-games.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/sentinel-roblox-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/900k-robux-free.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/cr7-test-roblox-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-is-there-any-hacks-that-avast-antivirus-allows.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-adopt-me-free-vbucks.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/farm-life-roblox-cheat.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-redeem-robux-cards.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-robux-codes-2021-wiki.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 3

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_off000040d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40D7 25380 bytes
SHA-256: 75fb48234115ccc13eb317aaff05bac0f3c24b3e0536031796138f6584211296
font_01_sfnt_off00007bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD9 18488 bytes
SHA-256: 4a4a340c638fbbb3f1b79ce55467ef148b376f3f051340ca6cd6ff19e65929d3

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