Malicious PDF — malware analysis report

Static analysis result for SHA-256 abffbb813e39e1a8…

MALICIOUS

PDF

46.6 KB Created: 2021-05-10 16:01:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 876786bf0d0ca2bc5af4a44d438d0a6c SHA-1: 0b9febbc0320a49438b526207cd167c31c6af8bc SHA-256: abffbb813e39e1a8056c6b783197a171ef21889fffc29fc7758ed54efc442b5d
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link that points to a URL associated with known malicious infrastructure. The document body and embedded URLs suggest a lure related to free game items or cheats, a common tactic for social engineering. The presence of a 'password-protected archive' lure heuristic further indicates an attempt to bypass security controls by encrypting a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • 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 https://netcdn.xyz/app/406889139/i-can In PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/play-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b54.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B54 30888 bytes
SHA-256: 2b27e1cbccb78520ac4b749e9a684142f0c4755b87aaabac0a555aeca8519219
font_01_sfnt_off00008b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B3A 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000094eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94EB 17952 bytes
SHA-256: ff0c2fd87def8c3d08bc052d35a059552b69b6ff80e738d461809d40e2b5bde5

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