Malicious PDF — malware analysis report

Static analysis result for SHA-256 35fb7c2b435cded9…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 20:12:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dac26513aa35715e2fb565533f8fe874 SHA-1: 55bc5d047aa6e025c5d16a069ac35361ecac4c29 SHA-256: 35fb7c2b435cded9d860ef56f9dc1d884c7abc55f0572ea82a7566930dc1ffa2
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that explicitly advertises free in-game currency and hacks for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

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/getting-robux-free-for-roblox-no-paying-game-hack PDF link annotation
    • http://technologicalsc.com/images/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/roblox-how-to-create-free-model_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/wurst-18-9_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/roblox-free-draw-how-to-draw-a-vagina_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/auto-redeem-roblox-hack_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/free-roblox-account-pasword-and-user_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/roblox-pool-tycoon-4-cheat-engine_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/my-robux_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/design-it-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-free-rare-cards_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_off00002e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E68 22556 bytes
SHA-256: ea682e6b77a1c542a277e8d0d90cc7f9cc79e708e750d6b1db8211cac23c3939
font_01_sfnt_off000060a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A6 19348 bytes
SHA-256: 6c6e2c5a6b73b4a4b50928e330ed011f8e1dec2f1d3bf3252fedfbe892cae6e0

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