Malicious PDF — malware analysis report

Static analysis result for SHA-256 53a8223a04a6538e…

MALICIOUS

PDF

35.2 KB Created: 2021-06-18 08:11:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: dfd0681d5c4ec2f6b460d0ff2a09e980 SHA-1: 6b5b1a6f0866595eb03bf5127ef3e3d2498c81a8 SHA-256: 53a8223a04a6538e0f54d75050a606a0825f2bed038f40938a0e248ad223f6eb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to game hacks and free currency, which is a common social engineering tactic to entice users. It contains multiple embedded URLs, including a critical redirector link to 'netcdn.co', which is flagged as malicious. The document body and heuristics indicate a redirection workflow designed to lead users to potentially harmful content or scams. No scripts were extracted, but the presence of malicious redirectors and the lure strongly suggest a phishing or scam attempt.

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.co/app/431946152/money-hack-sur-sunset-city-roblox-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/check-it-free-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-xbox-one-free-packages_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/wurst-115_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/is-the-robux-hack-safe-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/pubg-uc-to-usd_GM1330123889.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-mm2-free-knife-codes_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-with-inspect-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_002_off000031df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31DF 22392 bytes
SHA-256: fcba2ddcc92f2f749add4d8541de60e2ad27b93b00ec9021b5333fde4ae615a2
font_01_sfnt_off000063a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A7 19396 bytes
SHA-256: 5e07ee9570442f566bfc422334934394b4cd276afe608f8223ae1e9c590c4c4d

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