Malicious PDF — malware analysis report

Static analysis result for SHA-256 270f91aeec1b09e0…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 12:51:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c77c0102dd0bc28041589f4ca925b3f3 SHA-1: 21f38f1b8562d1395f4de2be3d5c8dead4f76398 SHA-256: 270f91aeec1b09e04057b58e69483d0a3f77ae337da824f4d5f24d973a59d99e
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The document body and embedded links suggest a lure for users seeking in-game advantages, which is a common tactic for phishing or malware distribution. The presence of a password-protected archive lure further indicates an attempt to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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 http://netcdn.tw/app/406889139/haktuts-2021-coin-master-free-spin-link-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-girl-shirt-codes-free-shipping_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-use-slayer-leecher-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-robux-card_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/one-player-game-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/i-hacked-it-roblox-piano_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-minecraft-java-free_GM479516143.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_003_off00006285.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6285 18884 bytes
SHA-256: 7fbaae8c74c80ad8c6004c185d9f2f033924c4f14cdb292a6e337190a643b689
font_00_sfnt_off00003025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3025 22656 bytes
SHA-256: c64f4a624291d9c20b69dfacbad45bd1d7a6578e4360f215eb78947576aa0540

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