Malicious PDF — malware analysis report

Static analysis result for SHA-256 849915e0c630db82…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 07:32:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 81d0a38a12ef44f294ac2b41ea7c1b9c SHA-1: 83150e98d5e8bec1ac10146598ef677abaaca919 SHA-256: 849915e0c630db82f8c98cccf4ec978ae4b6dd0494f039c6855d22a5a34a4135
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or free item generators. The primary malicious URL identified is http://netcdn.co/app/479516143/minecraft-bedrock-edition-free-with-java-game-hack. The document body and embedded URLs suggest a lure for free in-game currency or cheats, a common tactic for phishing and malware distribution. No scripts were extracted, but the presence of malicious redirectors and the lure content strongly indicate a phishing or malware delivery attempt.

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/479516143/minecraft-bedrock-edition-free-with-java-game-hack In PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/robux-cash-free_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-promo-codes-august-2021_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/cheat-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-cheat-engine-hacks-2021_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-much-is-uc-pubg_GM1330123889.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-robux-hack-generator-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-giveaway-2021_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-roblox-clothing-no-hacks_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-player-radar-hack-site-https-v3rmillionnet_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/1x1x1x1-in-april-fools-roblox-hacking_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/hex-blade-hack-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/earn-free-robux-scam_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-hack-tap_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-galaxy-arcade-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-jail-break-hacker-vs-noob-vs-pro_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_off000031b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B8 22628 bytes
SHA-256: 2bfd856878d062fbd798c8d8f7895fb942e113b52ea33ae8e5e010131725303e
font_01_sfnt_off000063b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B0 19204 bytes
SHA-256: 90a52e35a77309da72f66e30604d3124f1652836c7ee3d665ece2cb7a8fd5b4e

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