Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2b8d28fb65ac4c…

MALICIOUS

PDF

88.6 KB Created: 2021-03-30 04:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4ff56d7bb5192877594fbec91e33ca3a SHA-1: fce28ef346756ffea5820d1c5eb8e65b8520aa83 SHA-256: df2b8d28fb65ac4ce80d0b855a888590aa369a46efa74cff0d4305e2fe010535
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The PDF contains numerous embedded URLs, with one prominent URL pointing to a link farm on disposable hosting. This suggests the primary purpose is to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/strik?utm_term=behringer+xenyx+1202fx+power+switch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380682/normal_60626591c464f.pdfIn PDF document text
    • https://cdn.sqhk.co/rewaloxuruvu/iyiahec/critter_escape_mod_apk.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/zujonidabotidusel.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/hindu_baby_boy_names_starting_with_s.pdfIn PDF document text
    • https://cdn.sqhk.co/gizivapejoko/tgdhflD/sozudaribabanov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_6055226c67afa.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/cgiPher/aafes_optical_fort_hood.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/aUgjNhj/wezawufemi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dda7d5c-d19c-43c2-9360-d940d719b2c4/katodap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c54cc879-fc7a-440c-95ab-98f7e384be11/preposition_quiz_4th_grade.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/54914406726.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/79264149345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ab20eb-c96a-4f43-9ef3-1eb8ed48a74f/76859304473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18638486-10ad-47f5-ac51-51bee64146e6/47942466020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/added829-d481-4e30-893c-ff932ded84d8/jegubogekugenelazafaber.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/fashion_brand_positioning.pdfIn PDF document text
    • http://bidejepeko.onlinewebshop.net/bwv_1004_allemande_guitar.pdfIn PDF document text
    • http://nubibubimalepik.atwebpages.com/catan_almanac.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/caliban_y_la_bruja_libro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc79039-da0b-4d2d-a21e-aca30e0a87df/gasutipofuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d4b5e83-bcf2-424a-b647-14c9ec39d56b/fimewebalerop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/599fbe4e-c49c-463e-ab44-2104217feea1/kogakanikowuzamezazebita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3751cc-bb1f-481e-87bd-0f57eae1a6b2/mary_rowlandson_a_narrative_of_the_captivity_themes.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001194e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194E 5672 bytes
SHA-256: 81dad5a00afb692a908c354b9d4b58225f9c18b5588f2ad953dbf2b93eac7d9d
font_01_sfnt_off00012cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD4 11280 bytes
SHA-256: 334448327cf4c34933d89d600ae174db3e60135e11768ea22d673d8b041c2bae

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