Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac3e41d387ea0cf…

MALICIOUS

PDF

33.8 KB Created: 2021-06-20 12:52:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 70c02b5efd3c23c8c37c459706b2ff11 SHA-1: aa17e2193bfc6b146665f6001598de5ea2992d4f SHA-256: eac3e41d387ea0cf8c308b308863bb5fd09beca99997181c11c718a695917091
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'Roblox Hack Menu 2021' and related game cheats. The ML classifier also flagged this PDF as malicious. The primary attack vector appears to be luring users to click on these links, which likely leads to the download of a second-stage payload or further phishing attempts.

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/roblox-hack-menu-2021-game-hack In PDF document text
    • https://i-tech.ac.id/perpus/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/hacked-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-get-robux-for-free-2021-october_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-hack-roblox-on-skywars_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-giveaway-live-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-code-fandom_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-speed-client-hack-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/groups-that-give-free-robux-roblox_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/i-want-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-roblox-keyboard-clicker-download_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/cch-ly-robux-free-de-nhat_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-tshirt-roblox_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-jailbreak-cheat-table_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_off00002f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F06 21400 bytes
SHA-256: b601113d87ec144ce0e013f390928ad20bcbe47e72971c9c549ee1ce39d0a31f
font_01_sfnt_off00005dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBD 19392 bytes
SHA-256: ff5fbe22b0fe0a6fd871bd407160007091193243f11f80fec527a4ecf6bf4f6b

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