Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c47568914f4b44…

MALICIOUS

PDF

75.1 KB Created: 2021-04-29 05:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 424934cbb75dbabe4d271b90c1e2a856 SHA-1: 790c20908ce7d9985b97bd375e4c9a208e2d4f3c SHA-256: 33c47568914f4b44c7e898a457a8c5c5755061d4b81f37fa0132bb402b35f199
196 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It contains numerous external links, many of which point to an SEO redirector designed for phishing, disguised as a resource for creating 2D animation. The primary malicious URL identified is https://midufefew.ru/strik?utm_term=how+to+make+2d+animation+with+blender, which is likely used to deliver a secondary payload or redirect to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://midufefew.ru/strik?utm_term=how+to+make+2d+animation+with+blender PDF link annotation
    • http://shtancircul.site/chrome_for_windows_server_2019bang1.pdfIn PDF document text
    • http://zumbayuliya.online/lukesoe4ro8.pdfIn PDF document text
    • http://beremoter.online/how_to_make_a_flamethrower_little_alchemyti6sm.pdfIn PDF document text
    • http://uspex22.online/ar_15_10.5_in_pistol_in_texas81bqp.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/washington_dc_weather_today_and_tomorrow51ypz.pdfIn PDF document text
    • http://new-volosi.ru/bakolefafovegug9uvj.pdfIn PDF document text
    • http://lbaranaydin.com/xumasexakuzidyklr6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wutogugej/rewaxunemexawefurav.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/40479362129.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/93355998612.pdfIn PDF document text
    • https://87d5e434-dc39-4d64-8681-877d64e204d5.filesusr.com/ugd/5660ac_f82f394bcc114f7ba0c8e10443f5d2d8.pdf?index=trueIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_d316b7fb09a14f038d173844cd92b7e2.pdf?index=trueIn PDF document text
    • http://gegokuberil.rf.gd/sea_animals_pictures.pdfIn PDF document text
    • http://muwumatenenuli.rf.gd/zolupepug.pdfIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_3b88e637bad04a1fbc9c8a8c8b621015.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xojafemori/bluetooth_suite_win7_free.pdfIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_847f59b5873e4b14bb35ee5f4b5258a5.pdf?index=trueIn PDF document text
    • https://ff19a39e-637c-4fc6-80cc-750024e8dd37.filesusr.com/ugd/d217e2_f3b323ac371d4256b592fbda11b99fc2.pdf?index=trueIn PDF document text
    • https://78de399b-5cb1-4d05-8290-e7933402b20f.filesusr.com/ugd/10f998_936a613777284c249d9665e4de770da0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vojapu/24729666342.pdfIn PDF document text
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_0d701f93790f42dca54512ad892a3e53.pdf?index=trueIn PDF document text
    • https://9eff4bf0-55a5-42b9-a65a-250f23c32afd.filesusr.com/ugd/80978b_b06d5714c20e4fefa042ee52460e79a1.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71B 5276 bytes
SHA-256: 5e04058df0a1863585b38c4bdd15e98ba4ae07301052935525f0fc5488664e17
font_01_sfnt_off0000f8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8ED 11208 bytes
SHA-256: b721f222071ea811528d17bbbdcb0178d321bdc20014b02eec39eb3617e40f1c