Malicious PDF — malware analysis report

Static analysis result for SHA-256 1322d5c0ab90ec9d…

MALICIOUS

PDF

74.1 KB Created: 2021-03-17 12:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eb791618d923f47d7d4c5cf67a56653 SHA-1: 13b14819ad09ceabffd19670208e65217feae156 SHA-256: 1322d5c0ab90ec9dfbc0f2efb0a623597aa388b21453f69ea64e9ef36fa54969
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external links, including one to 'resalured.ru', suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to 'sport clips coupons online', indicating a lure to entice users to click the embedded malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/wix?keyword=sport+clips+coupons+online
    • https://static.s123-cdn-static.com/uploads/4367299/normal_5fdf734d91a13.pdf
    • https://cdn-cms.f-static.net/uploads/4374379/normal_604b841df2d0f.pdf
    • https://cdn-cms.f-static.net/uploads/4412761/normal_603e1784b4e26.pdf
    • https://static.s123-cdn-static.com/uploads/4425255/normal_5ff9ae2d2d94e.pdf
    • https://cdn-cms.f-static.net/uploads/4457014/normal_600a1bb28a883.pdf
    • http://giwosoto.sportsontheweb.net/pekimosaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pojoviraxerojo.myartsonline.com/xamifesozovexedu.pdf
    • https://s3.amazonaws.com/naxozelozude/use_a_resume_template_microsoft_word_2007.pdf
    • http://gaxilitexu.onlinewebshop.net/bottle_feeding_advantages_and_disadvantages.pdf
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_eeb311df8b314d5883bf59b0e21d8091.pdf?index=true
    • https://db7841a4-af10-4990-a2be-f084cd4acbf6.filesusr.com/ugd/e3c460_d541286188bb408996c7fc13da3b6cb8.pdf?index=true
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_d212ab2c12c040058a791108e9f9cfad.pdf?index=true
    • https://s3.amazonaws.com/zuguvoxoki/58922648973.pdf
    • https://s3.amazonaws.com/tuxalowafokuvo/what_do_i_need_for_a_mississippi_drivers_license.pdf
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_739bb6651f1e4fdca8fa84939d86cb25.pdf?index=true
    • https://s3.amazonaws.com/pezofut/grandview_hotel_reservation_form_ielts_listening.pdf
    • https://s3.amazonaws.com/zufojadibi/25639915107.pdf
    • https://s3.amazonaws.com/novifamigot/sipafalagesubiwoxa.pdf
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_7adc8ae43a694e5498d8b397870f2c7f.pdf?index=true
    • https://s3.amazonaws.com/nabifovu/paguwizedego.pdf
    • http://belibivizonojo.myartsonline.com/how_to_set_an_armitron_all_sport_watch.pdf
    • https://s3.amazonaws.com/zupenafud/42745732636.pdf
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_78adf48417174276ad1095225e166e89.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ef.bin
500068797ef94321222a5d4ae7f2d8b1353459ee1e73ca3e90aa5cbbb89d4ac1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EF 4820 bytes
font_01_sfnt_off0000f665.bin
b0fef9256cbbe694f7f828c871cd00aa7fe7afe945ed2f33edd2aa7c7f7f21a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF665 10836 bytes

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