Malicious PDF — malware analysis report

Static analysis result for SHA-256 96528976c29dfa37…

MALICIOUS

PDF

35.5 KB Created: 2021-06-26 12:37:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a8e703e48a6599c60c2b2090149d531f SHA-1: 56784289c37a02c0bf895d4d5672e47609bee61e SHA-256: 96528976c29dfa376e66f5add36f255160ad18828b2d23ff3850a612131dd5e4
200 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links that redirect to malicious infrastructure, masquerading as free game hacks and impersonating Microsoft. The primary redirector URL is http://netcdn.co/app/431946152/free-robux-hack-no-survey-game-hack. This indicates a credential phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/free-robux-hack-no-survey-game-hack.
  • 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-robux-hack-no-survey-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/retail-tycoon-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-capes-for-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-hack-download-mobile_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/instalar-hacks-de-comandos-de-admin-para-roblox_GM431946152.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/free-roblox-premium-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-skin-roblox-men_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-hack-week-video_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/penguin-roblox-free_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-redeem_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/cheat-codes-for-roblox-mad-paint-ball_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-cheat-for-robux-no-phone_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/sb-game-hacker-coin-master_GM406889139.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_off000032f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F6 22592 bytes
SHA-256: 61494cb6b664860d6bc2fbd413f141d7e5b5b563f54ba8dbf4bde74a0cc92ac9
font_01_sfnt_off0000657c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657C 19180 bytes
SHA-256: 204515a96f8653e67fd306e19ad276bad3f5781a0609c259f28a41e9985768ae

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