Malicious PDF — malware analysis report

Static analysis result for SHA-256 f892944ea3da4da0…

MALICIOUS

PDF

94.5 KB Created: 2021-02-24 22:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a852ffe5e921db91b923fa0a6dad282a SHA-1: 83df19d56a15d36fe42a585e7b6fdde71fd72b34 SHA-256: f892944ea3da4da0fdc82a965b6540759a28cd80cbb15831147d542da45c0056
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, identified as a link farm, directing to various domains. One prominent URL, 'https://crophysi.ru/wix?keyword=discord.me+bot+commands', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to 'Discord.me bot commands' and authoring information, suggesting a potential lure or misdirection tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://crophysi.ru/wix?keyword=discord.me+bot+commands In PDF document text
    • https://cdn.sqhk.co/nozedimasav/ajcjgab/tilujumunisanil.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/gejcP23/papovevorafu.pdfIn PDF document text
    • https://zezowamizafomex.weebly.com/uploads/1/3/1/3/131381240/aa7f64bbfb24d.pdfIn PDF document text
    • https://cdn.sqhk.co/wanuvudeb/gjhaShg/game_screen_recorder_facecam.pdfIn PDF document text
    • https://venunuwaxel.weebly.com/uploads/1/3/2/7/132740799/dujuxap_pavonurasibudox_puloxegisa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471945/normal_60205ece3f441.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/jeijjet/greatest_rock_hits_of_the_80_s_album.pdfIn PDF document text
    • https://cdn.sqhk.co/resesexiraf/9ighdVn/9350500399.pdfIn PDF document text
    • https://cdn.sqhk.co/muwitajo/ugiUhfA/makomekijuzalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449604/normal_60218dcb3abd8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385437/normal_5fe4c54f222a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411921/normal_601dd31c19ccb.pdfIn PDF document text
    • https://cdn.sqhk.co/bobavijiwoba/jjiahau/dog_runner_for_yard.pdfIn PDF document text
    • https://sikefenuvip.weebly.com/uploads/1/3/4/0/134012601/27fdd12539b53.pdfIn PDF document text
    • https://cdn.sqhk.co/lizubenesowi/3hbYgfs/stealth_mode_toggle_on_snapchat.pdfIn PDF document text
    • https://cdn.sqhk.co/jobezivozuf/jbhaXig/makilenikejupijuvopiwiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kisitibonadal.rf.gd/fotutukegukasakuz.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF780 8128 bytes
SHA-256: 1f25417c88eb983a96375a9fe091dba2eec7fe95ea721de0db81b7851c08499b
font_01_sfnt_off000111f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F9 5224 bytes
SHA-256: ff5a56f8a9272c081434cbe566a45de24c8d8623de66c6a0bd4485e717ca0c38
font_02_sfnt_off000123a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A3 2336 bytes
SHA-256: 898223b02a889b0f740dd27fa57001dcb798880847994261e65068614389c5f3
font_03_sfnt_off00012e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2F 12108 bytes
SHA-256: 1f5e4da17164cb06483c2e055298e3a85b186d64b7dac73d00326d2d4461a1ac
font_04_sfnt_off00015682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15682 16120 bytes
SHA-256: 467334b253c03183b8f59c8c7859f446a4d85e3bd71546e4bc7697603d08a064

Open this report in the interactive analyzer, or submit your own file for analysis.