Malicious PDF — malware analysis report

Static analysis result for SHA-256 619fe919fe7e6709…

MALICIOUS

PDF

35.8 KB Created: 2021-07-03 23:39:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 73d02b7871082c06569be15c2e916263 SHA-1: b309b62e16fff59564c612ebd2aa3fd04c324237 SHA-256: 619fe919fe7e670902c23b123391a93c607191503b56f40033655488ecc9fb11
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or malware distribution attempt. The heuristic firings confirm the presence of malicious redirector infrastructure and a lure for game hacks. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to exploit user interest in game cheats to redirect them to potentially harmful content.

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.tw/app/406889139/coin-master-free-spins-hacktman-game-hack In PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-admin-hack-dll-download_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-do-you-hack-a-roblox-server_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-account-hack-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-games-no-verification_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-hack-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-free-gampasses-in-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-game-that-showed-on-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/hack-cruise-ship-tycoon-roblox-money_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-code-card-free_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-easy-money_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-base-wars-hack-god-mode_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-hack-accounts-on-roblox-easy-method_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-hack-that-works-when-you-use-card_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/hacks-roblox-royal-jelly_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-level-6-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/jailbreak-robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34E7 23036 bytes
SHA-256: 361898cdbe14de3644c722e1ebb1ac24fc94dd8ea56057b0e2b820cf23bbe374
font_01_sfnt_off0000689c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x689C 18604 bytes
SHA-256: 4bdfeca594628802d69067d6b2f20385009c2d8f96afc7f272a39be84923808b

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