Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d782b09d979c133…

MALICIOUS

PDF

44.8 KB Created: 2021-05-10 21:20:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4f87e38e7eae75328d5d85b5e826a000 SHA-1: f940fd7bce4fa89745d016b06b97855850700252 SHA-256: 7d782b09d979c1334fa1411ef4c81e818fc4fbde46716a8fd7a9cfcdbfc6960c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of SEO-optimized links pointing to other PDFs, many of which are related to game hacks and cheats, suggesting a link farm or phishing lure. One of the embedded URLs, https://netcdn.xyz/app/406889139/kachifpro-game-hack, is directly associated with the file's content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/kachifpro-game-hack
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spins-link-today_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/cool-minecraft-hacks_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/freerobuxhack-us_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-spins-coin-master-haktuts_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/real-roblox_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/www-coinmaster-com_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-coins-link-facebook_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/where-can-i-get-free-coins-for-coin-master_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-ways-to-get-robux_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/kuso-icu-roblox-hack_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-spins-and-coins-coin-master-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004abe.bin
0bed97eba15be17d41116df10359ded8141443156aafadd84c9c6b38ac0227d3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ABE 24780 bytes
font_01_sfnt_off00008309.bin
8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8309 3204 bytes
font_02_sfnt_off00008e0c.bin
f5f16e9fe06415f99f9f196ec79e922628d3dac9c37f6a7894d79eeb781dffd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0C 17784 bytes

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