Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56c9a1d4e8b3796…

MALICIOUS

PDF

78.5 KB Created: 2021-03-28 11:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 05bd6068dca56a527a3b52f548522a81 SHA-1: 6d3aa4dcc98f03eabc376cdcab6f359196329a72 SHA-256: d56c9a1d4e8b37964447ce07141dbf2358b8871c7988b0f8d017ce55b147acf6
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/strik?utm_term=will+grayson+will+grayson+synopsis PDF link annotation
    • http://digitalmicroteter.xyz/bebavakuxotobenidonasani9rbig.pdfIn PDF document text
    • http://getcreditreport.info/xugewovikikibodejaleso6edw.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/gcgjgjp/new_gospel_songs_2020_list.pdfIn PDF document text
    • https://zulozagadome.weebly.com/uploads/1/3/4/3/134318764/162307.pdfIn PDF document text
    • http://santecmb-sarl.com/fipagimed5nyk.pdfIn PDF document text
    • https://cdn.sqhk.co/jorawuge/4gjEjj3/dudezesefojusajadanojiso.pdfIn PDF document text
    • http://rivugijunamusi.mygamesonline.org/5th_grade_math_enrichment_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/0Nhjjde/71597617556.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/8720446325x3bl4.pdfIn PDF document text
    • http://rankingcoach-apps.com/how_to_get_your_stamina_up_for_soccer290mv.pdfIn PDF document text
    • http://bobixina.getenjoyment.net/oxford_discover_2_student_s_book.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/75770192844dhtxj.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupesiparu/ex9Y1ji/vampires_wife_dress_sewing_pattern.pdfIn PDF document text
    • http://bullbananavannaone.xyz/15244973729pgv9g.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/97a29c3f99539.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_e8c1eed0f8834922a16d4deedf0f0418.pdf?index=trueIn PDF document text
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_30fc3db1c5af44ac9b32e6b257b384b9.pdf?index=trueIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_a62e0d02ec954ee7976f6a897eef4880.pdf?index=trueIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_1c75db6a51914ae5ab9b4f71caa62af6.pdf?index=trueIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_3ce70d720c594c7c927a94c51df7333a.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_off0000f67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67C 5196 bytes
SHA-256: 9c94a143c0ce85207c73097548781294d56c742c6d134fc31fa3508246840b53
font_01_sfnt_off00010858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10858 10652 bytes
SHA-256: 1c077a59ffc1b8ddc5bf6d45e1d24003e538f380a64f3d06d7ddcd165c605fb9

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