Malicious PDF — malware analysis report

Static analysis result for SHA-256 5174da57dceb2f0a…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 16:53:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1c6b849b7cae2ea0a9d931b4e09c088d SHA-1: 4e4dad6add0c3237b9b782a8185b42f38b31b31f SHA-256: 5174da57dceb2f0aa9521bb74eb59d050f328583b3a80186f2839d28d49dafab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically targeting users interested in game hacks and free currency. The document body and extracted URLs indicate a lure for obtaining 'free Robux' or similar in-game items, which is a common social engineering tactic. The presence of embedded links and the ML classifier's high confidence score support this assessment.

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/431946152/how-to-get-free-robux-without-verification-2021-game-hack In PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-pubg-uc-carding_GM1330123889.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-free-robux-on-roblox-2021-real_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-free-coins-on-dance-off-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-urbis-hack-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-how-to-get-unbanned-with-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-money-hack-bloxburg_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_off0000328e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328E 22172 bytes
SHA-256: ee69c3e687534cf2157f2b0e745ad58748b5184162f9fb7b2fdd87e210cad78e
font_01_sfnt_off000063b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B6 20004 bytes
SHA-256: f525ebf185ff77ca350f82577fc455037f682c9e152adbcdc84b979bf7cf1078

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