Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c5bb739693061b…

MALICIOUS

PDF

140.7 KB Created: 2022-07-08 01:24:23 +00:00 Authoring application: rozchi (via PDF Master 1.0.1) First seen: 2022-07-15
MD5: 73d76cbfc4b55c23f95705492b4b8430 SHA-1: 98a9690ae2a5c93c4a5fbe6543d38892f36dfd3d SHA-256: d9c5bb739693061b52c6f050d023d1408ab09c0ea63bfcf3d110a0bd6a200f20
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_LINK_FARM' indicates a high volume of external links, and the presence of URLs like 'lehmanbrotherbankruptcy.com' and links to cracked software further supports a malicious intent. The document body is heavily obfuscated and does not provide direct clues, but the overall structure and linked content point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0048

Heuristics 3

  • 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.
  • 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://lehmanbrotherbankruptcy.com/ZG93bmxvYWR8blEyWWpWM2FYeDhNVFkxTnpFNE5qazFOWHg4TWpVM05IeDhLRTBwSUhKbFlXUXRZbXh2WnlCYlJtRnpkQ0JIUlU1ZA/arraylist.bass/aWYgaSBmYWxsIGJ5IHNoaXJsZW5ndGVhcmplcmt5IHBkZiBkb3dubG9hZAaWY/bushbucks/underachievers.proposals.perfectionist
    • https://www.beaniescustom.com.au/sites/www.beaniescustom.com.au/files/webform/ETABS-181-Crack-With-Full-Torrent-2020-Latest.pdf
    • http://listoo.de/wp-content/uploads/alekhr.pdf
    • https://1w74.com/mardaani-top-full-movie-in-hd-1080p/
    • https://digipal.ps/blog/index.php?entryid=6098
    • http://www.viki-vienna.com/hd-online-player-tamil-dubbed-1080p-movies-housefull-exclusive/
    • https://theoceanviewguy.com/wp-content/uploads/2022/07/shawove.pdf
    • https://yemensouq.com/wp-content/uploads/2022/07/DameWare_Mini_Remote_Control_7590_Portable.pdf
    • https://rondaplaces.com/wp-content/uploads/2022/07/uldidal.pdf
    • https://stonerx.me/upload/files/2022/07/3AkYpj4aJiDJHVpqkwZ6_08_4088d7bf396d87ad6ece657daae049ee_file.pdf
    • https://www.brandybo.com/wp-content/uploads/2022/07/Hate_Story_3_Full_Movie_In_Hindi_Hd_Download.pdf
    • http://www.ressn.com/descargar-crack-de-bionic-commando-rearmed-upd/
    • https://mandarinrecruitment.com/system/files/webform/darkbem646.pdf
    • http://angkasydney.org/ashampoo-winoptimizer-17-00-22-crack-torrent-new-keygen-latest-version/
    • https://menamlanxang.com/wp-content/uploads/2022/07/berlann.pdf
    • https://www.petersonsign.com/sites/default/files/webform/publicfiles/schmar646.pdf
    • https://wozyzy.com/upload/files/2022/07/YUWCxAjy6rtLskcZY3vG_08_4088d7bf396d87ad6ece657daae049ee_file.pdf
    • https://www.beaniescustom.com.au/sites/www.beaniescustom.com.au/files/webform/ETABS-181-Cr
    • https://yemensouq.com/wp-
    • https://stonerx.me/upload/files/2022/07/3AkYpj4aJiDJHVpqkwZ6_08_4088d7bf396d87ad6ece657da
    • https://www.brandybo.com/wp-
    • https://wozyzy.com/upload/files/2022/07/YUWCxAjy6rtLskcZY3vG_08_4088d7bf396d87ad6ece657d
    • https://siodaropigdipip.wixsite.com/prosunasam/post/championshipmanager0304freedownloadfullversion-~repack~
    • https://rockmitnesixs1984.wixsite.com/merimipad/post/refx-vanguard-vsti-v1-7-2-air-crack-exclusive
    • https://wakelet.com/wake/aDrWlzC4W3Hwuq00AVrKl
    • https://prefimhilsukarep.wixsite.com/dishasbquarsunb/post/mixed-in-key-dj-software-for-harmonic-mixing-8-5-3
    • http://www.tcpdf.org
    • https://siodaropigdipip.wixsite.com/prosunasam/post/championshipmanager0304freedownloadfullv
    • https://rockmitnesixs1984.wixsite.com/merimipad/post/refx-vanguard-vsti-v1-7-2-air-crack-
    • https://prefimhilsukarep.wixsite.com/dishasbquarsunb/post/mixed-in-key-dj-software-for-harmonic-
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_016_off0001b7c4.bin
df221e87b81d1531cafdadb6c09a602e9f604d1baf0a17bbd350cbb83baa06f7
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B7C4 119072 bytes