Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe559d3a0f3977d…

MALICIOUS

PDF

44.8 KB Created: 2021-06-08 01:09:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5444e76c20a623a8d64719b8c41253c8 SHA-1: 7530ff91fbb0dcf2e84b870590faf8b27e0c6306 SHA-256: 3fe559d3a0f3977dfa4ebdb4f8558b8277d926bd306938e2f538661fb5c27a4b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are SEO-optimized and point to sites offering free in-game currency or items. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm designed to redirect users to potentially malicious websites or phishing pages. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate a malicious intent to lure users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/rthe-wild-west-roblox-when-is-going-to-be-free-game-hack
    • http://halitbayramoglu.com.tr/images/how-to-get-minecraft-coins-for-free_GM479516143.pdf
    • http://halitbayramoglu.com.tr/images/freer-tiktok_GM835599320.pdf
    • http://halitbayramoglu.com.tr/images/codes-how-to-get-free-robux_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/blogspot-free-spins-coin-master_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/free-robux-no-human-verification_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/cheat-prison-life-roblox_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/free-coins-2021-coin-master-link_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/coin-master-bonus_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/roblox-hacks-2021_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/how-to-get-free-robux-easy-2021_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/coin-master-free-coins-and-spins-link-today_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/coin-master-hack-version-download-2021-android_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/roblox-ninja-warrior-teleport-hack_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/update-coin-master-free-spins_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/pokmon-go-free-download-apk_GM1094591345.pdf
    • http://halitbayramoglu.com.tr/images/roblox-hack-codes_GM431946152.pdf
    • http://halitbayramoglu.com.tr/images/coin-spin_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/free-spins-coin-master-daily_GM406889139.pdf
    • http://halitbayramoglu.com.tr/images/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052ce.bin
125958770399fd239ef684b82bb19aff1e68e1356da2b92343fab54201265af0
pdf-font-stream PDF embedded font (sfnt) at offset 0x52CE 24372 bytes
font_01_sfnt_off00008a43.bin
6f95ae893563e697f9eb594fe51f9a1360eb1370e971df932d2def78f7c31316
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A43 18996 bytes