Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ffb4b7c0a1aa18…

MALICIOUS

PDF

36.4 KB Created: 2021-06-20 13:28:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 92f562834fead3298f2e3340bb7ed23c SHA-1: e787d47a0a31a90b815f0b0fbc703ad707ea0f2f SHA-256: c4ffb4b7c0a1aa18d3700675f1cf2a4d07923ea9eb27afebb8f184eb995a83a2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generator / game hack' content for popular games. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs confirms a lure to external, potentially malicious, content. No scripts were extracted, but the document's structure and embedded URLs indicate a phishing or malware distribution 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/free-op-roblox-exploit-seraph-v2-game-hack In PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-lifting-simulator-hack_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-generator-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hack-in-roblox-account_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-jailbreak-cheat-codes-and-hacks-for-samsung_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-geaar-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-gift-cards-no-human-verification_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-free-gucci-pants_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/god-mode-hack-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-hack-one-mill-in-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/roblox-robux_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_off000035e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35E0 22616 bytes
SHA-256: 3e111c014e15bbb22d7aad6eb94d91d35b03c6126c39be2171fd1945aa1b2b4d
font_01_sfnt_off0000683e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683E 19476 bytes
SHA-256: b2d842dddef893a0df4ef19885f472db980421c87e8de18dd064f92f480e2a03

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