Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa5f11edf11bbbb…

MALICIOUS

PDF

44.2 KB Created: 2021-06-04 00:03:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e5074d0a10e070d6d54cea223c4390e5 SHA-1: 86309a05069493305523e54dc0ffa24c5c37b575 SHA-256: dfa5f11edf11bbbbf67ac4e05d7b6ccd508b3de4e8a056ecf97af54de6ad1520
260 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors and game hack lures, impersonating the Apple brand to trick users. The primary link, https://netcdn.online/app/431946152/roblox-verification-game-hack, is associated with a 'game hack' lure and credential phishing. The document body, though heavily obfuscated, contains references to Roblox verification, further supporting the lure theme. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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: https://netcdn.online/app/431946152/roblox-verification-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 https://netcdn.online/app/431946152/roblox-verification-game-hack In PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/spin-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/give-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-coin-master-spins-hack_GM406889139.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_off00004f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F68 25236 bytes
SHA-256: 0f8354852ae72228b02f56516dc8c3085155feb24e271ced6a91668dfc9f7c3d
font_01_sfnt_off0000899e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x899E 18372 bytes
SHA-256: 8e16c624761c7815a00ee9013e3827e71f8aa93179f7b81ef6a1eeeaa97f0eaa

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