Malicious PDF — malware analysis report

Static analysis result for SHA-256 efcc71610774816e…

MALICIOUS

PDF

35.0 KB Created: 2021-06-25 15:39:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 146db459c1c7d03209d44860bd732c57 SHA-1: 0a56cbd6c2b7b4fa1d4cf963252d09f05c586d10 SHA-256: efcc71610774816ed9053becba4b7d55c82b994104abb55d2be1b4abda923b9a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks. The primary malicious URL identified is http://netcdn.co/app/431946152/bug-me-not-hacking-in-roblox-accounts-game-hack, which is likely used to deliver a secondary payload or lead to a phishing page. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a social engineering attack.

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/bug-me-not-hacking-in-roblox-accounts-game-hack In PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/hack-bloxtube-beta-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/admin-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-gamepass-in-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/esp-hack-roblox-script_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/hacks-for-free-animations-roblox-proof_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-roblox-music-sound-ids_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/spin-link_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/advhaa-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-do-you-hack-roblox_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_off00003074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3074 22796 bytes
SHA-256: 0ccf95c2deb331c13dc30914547d18bc5338613143368878ff5948f4d531ff99
font_01_sfnt_off00006338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6338 19216 bytes
SHA-256: 08b341f6eb0c4c16c5c6f7f24ea057298a5e5fe140c35daf40cf183771d0b75b

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