Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dcdca827d9437f6…

MALICIOUS

PDF

35.5 KB Created: 2021-06-26 19:41:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 596aad08fb9baad4603bb6da66ca809b SHA-1: 597ab86568fe4dcb63670d65de69a071f06b9d34 SHA-256: 7dcdca827d9437f65c06141e78a059972156a7998b64cfc4db5cafe3b528f902
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, strongly suggesting a phishing or scam attempt. The document body and extracted URLs indicate a lure related to free game resources like 'Robux' or 'Coin Master' spins. The presence of external URIs and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-roblox-bloxburg-game-hack PDF link annotation
    • https://repository.stikesindramayu.ac.id/repository/roblox-survivalist-hack_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-robux-free-no-human-verification_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/hack-para-ser-bc-en-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-a-free-promo-code-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-clothes-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-robux-and-ticket-hackexe_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-hack-sword-fighting-tournament-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-cheat-tests-at-school-pictures_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/fly-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/pubg-uc-jazz-cash_GM1330123889.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-hack-roblox-accounts_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
font_00_sfnt_off00003326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3326 22956 bytes
SHA-256: a4c40dcbc37732e5d4ac3566bd55eea65e2bf12eb74fcf887ac140ab74e4fb06
font_01_sfnt_off000066bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BD 18788 bytes
SHA-256: 7ef29352447740874d8eeb180ecd97adc426bb9cb409cd183d2ad7434be87928

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