Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bba182c897a667…

MALICIOUS

PDF

86.5 KB Created: 2021-03-24 07:55:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95cf0d2a456a40e696bd680c0e23366b SHA-1: ef05c56d99a450b65f03f638a384352ebc064b29 SHA-256: 83bba182c897a667f592fd131bf8700e63f13b1ff7612b3efd701658790d833a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, directing users to various websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=amana+amap101ab+portable+air+conditioner+manual
    • http://erogan-columbia.site/best_general_biology_textbookge0u4.pdf
    • http://tameeniraq.com/35795664804yos9s.pdf
    • http://razvivatel.blog/pdf_test_file_multiple_pages56ht3.pdf
    • http://menbp.online/conservation_of_energy_problems_worksheetc59c5.pdf
    • https://jefilixepiras.weebly.com/uploads/1/3/2/6/132681342/fd68ec7752dd.pdf
    • https://dubobovutorikug.weebly.com/uploads/1/3/5/3/135332124/zanuwozuge.pdf
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/lozag-gezofixe-neturavulaxepe.pdf
    • https://bizavewes.weebly.com/uploads/1/3/5/3/135323934/tukajudepowumex.pdf
    • https://xikixunajaxata.weebly.com/uploads/1/3/5/9/135959014/sogujegu_bujoritetor_mosesuruba.pdf
    • https://jodawebodo.weebly.com/uploads/1/3/4/6/134634345/7314606.pdf
    • https://kibinino.weebly.com/uploads/1/3/4/6/134603545/436265fc7ae96.pdf
    • http://copyrighthelpbusiness.net/fafovubudukelewisumopida02ds8.pdf
    • http://burrrhey.tech/96858905098r4sn4.pdf
    • http://uber-global.com/singer_4423_instruction_booktccyo.pdf
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/8094702.pdf
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/bupolanusozedev-wiraj-furapo.pdf
    • https://pejupatuwotim.weebly.com/uploads/1/3/2/8/132814375/duwale-damubad.pdf
    • http://im-marceting.site/billboard_awards_2018_list_of_performers3avz9.pdf
    • http://copyrightshelpcenter.com/how_to_crochet_a_hat_for_a_little_girlxqr1k.pdf
    • http://ukranews.icu/refukuvisqp0et.pdf
    • http://good-production9.site/samsung_rf4287hars_ice_maker_not_dispensingtbvi7.pdf
    • http://huseyincanx.com/fufevunorulifojatazikoe5omt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/614db39a-5e98-4454-b074-7672a1684467/cant_access_my_cloud_dashboard_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/78996adc-973a-44d0-89c4-fe3be6f778c9/27121853780.pdf
    • https://uploads.strikinglycdn.com/files/777d2e21-34bf-4521-aa03-451315cd84a9/homer_iliad_greek.pdf
    • https://uploads.strikinglycdn.com/files/b974d084-ccae-46c5-925f-a24d8fa0686e/what_are_the_types_of_training_objectives.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010424.bin
715d4a78a66cc115fe42f458c60e03675ec9133b301f3e07dd9a7113cf95589f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10424 5244 bytes
font_01_sfnt_off000115cb.bin
ab420bbd46ab5a00eb098a9eaa06dad1f4e3b81bcc85c8a66d233d0fc8257e18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115CB 11676 bytes
font_02_sfnt_off00013d5f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5F 4324 bytes

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