Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86a84a84e156280…

MALICIOUS

PDF

34.8 KB Created: 2021-06-27 16:18:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 143c6d9690d7ee47c33762e8d38052ff SHA-1: 7668555032525232d176a2a18b2047ed443bb785 SHA-256: d86a84a84e156280a4aba3cc074a6cb735f1dc2a6438d15295b8771d7689a222
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to a redirector hosted at netcdn.co, which is flagged as malicious and associated with game hacks and free robux lures. The document body and heuristics indicate a social engineering attempt to trick users into clicking these links, likely leading to a malicious download or phishing page. The presence of a "password-protected archive handoff" heuristic suggests the actual payload might be further obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/como-hackear-en-roblox-robux-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-grand-crossing-roleplay-hack-gear_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hacks-for-roblox-parkour_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hack-no-virus-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-accounts-with-robux-bugmenot_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-coins-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hack-roblox-block-piece-autofarm_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/site-de-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-hack-no-verification-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-gift-card-codes-not-used-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-without-password-website_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/pubg-500-uc-price_GM1330123889.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-100-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hacks-for-games-roblox_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_off00003067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3067 22740 bytes
SHA-256: 8c00e595ffb5fc8ae2a72ab21a185c5f32e777c881a036007f0b10bde0351eb2
font_01_sfnt_off00006312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 19056 bytes
SHA-256: 2d50af743211578b974ff694b5e374c30b0e53b1434fa7e7ba72acca0838fb61

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