Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c81f4fa115b2b5b…

MALICIOUS

PDF

34.8 KB Created: 2021-06-28 09:00:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: cd64b2e3a42e18a427c765351c2e356b SHA-1: ab09fc6a42d49e9dbc1ac831e11c21d9a08d966f SHA-256: 7c81f4fa115b2b5bd0ced9a8909b1e29c8a8f567e15ef64b633dab797ff0a94a
160 Risk Score

Malware Insights

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

This PDF document employs a lure for free Robux and game hacks, directing users to potentially malicious URLs. The heuristic firings indicate that the PDF links to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the nature of the lure and the presence of multiple embedded URLs suggest an attempt to exploit user interest for malicious purposes, likely leading to a second-stage download or redirection to a phishing site.

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/get-free-robux-2021-game-hack In PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/roblox-free-robux-for-wiewers_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/how-to-use-a-cheat-on-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/buy-free-robux-roblox_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/free-expert-scripters-roblox_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/free-robux-giveaway-youtube_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/hspart-imahsimp-yhsbatch1p-pastebin-free-robuxtype-batch1q20212021shq_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/roblox-free-face-codes_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/speed-run-4-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/como-hackear-el-pin-de-una-cuenta-de-roblox_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/free-robux-promo-codes-may-2021_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://simpt.stikesmitrakeluarga.ac.id/cendana/repository/how-to-get-robux-for-free-2021_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_off00002f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F82 22728 bytes
SHA-256: e0d8beef87a8bbf65511fe1ebe2b9e15e9061e8f7d65d399c9172d2c3ef037aa
font_01_sfnt_off00006241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6241 19224 bytes
SHA-256: 821bcaeb5baca65cbb25255ca6205972482cf4d6c0082e9a42268983cc7c06a1

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