Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc2ad0206646812…

MALICIOUS

PDF

42.9 KB Created: 2021-06-03 13:59:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 64cc1d880df4a603286822afab87f996 SHA-1: d98f2fb238b0cf5de851f0218879afebf1b12497 SHA-256: 0fc2ad02066468123d2ae9fe0c5458cea94568170b5ef999f35d0a7b09669b1c
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users to external websites, with a primary link identified as a malicious redirector. The document body and heuristics indicate a 'free generator / game hack' lure, often used to disguise malicious content. The presence of a 'password-protected archive' heuristic suggests a common tactic to bypass security scanning by encrypting the actual payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://netcdn.online/app/479516143/worst-client-game-hack In PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/is-it-possible-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/what-games-give-you-robux_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
stream_004_off00004e2e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E2E 24596 bytes
SHA-256: 7b8f5f420562b3b11661e8b51289be99f6aae4cdebf0ddbe08479ef9a91de903
font_01_sfnt_off00008697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8697 17752 bytes
SHA-256: c4c464576242dc15d115a20e89f4ad7b5703edf25fae76549fb4d98dda0b80b5

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