Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b29df4f2ea3dbc3…

MALICIOUS

PDF

77.7 KB Created: 2021-04-05 08:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ddecacb351f2a6b1f18b7aa8d2b469a1 SHA-1: 2cbac50814868e19b3b3f33df5046e5602668a30 SHA-256: 1b29df4f2ea3dbc3d8dffd6ac8e97274f24784ac421d303a20039a9bbb786601
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs that likely lead to phishing sites or malware downloads. The heuristic 'PDF_SEO_LINK_FARM' specifically highlights the presence of a large number of external links within a small PDF, suggesting a deceptive tactic to drive traffic to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://botokaw.ru/strik?utm_term=all+the+bright+places+book+ending+explained PDF link annotation
    • https://xuxukiworizep.weebly.com/uploads/1/3/4/7/134723333/katikawafav.pdfIn PDF document text
    • https://gunesakozi.weebly.com/uploads/1/3/0/9/130968934/4653871.pdfIn PDF document text
    • http://tevituvodejifep.mywebcommunity.org/4864223570.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/nebiz.pdfIn PDF document text
    • https://nupafosudivoz.weebly.com/uploads/1/3/2/6/132682156/zonalom-tamisavafakis.pdfIn PDF document text
    • http://xijipeva.mypressonline.com/peruvi.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/niwiwafiwepofov.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/goxerufasije_sisorepetanijix.pdfIn PDF document text
    • https://zuwezulexexufup.weebly.com/uploads/1/3/4/5/134582503/wujubol.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/b89e8d1f-3097-467d-bfff-d563c9532015/why_is_uconnect_phone_not_available.pdfIn PDF document text
    • http://mebijido.rf.gd/christ_stopped_at_eboli_full_movie_english_subtitles.pdfIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_450ce6d835de4d6c86ee8e9a8cd812e6.pdf?index=trueIn PDF document text
    • http://pakebixulo.epizy.com/accounts_assistant_resume_template.pdfIn PDF document text
    • http://fokezazonof.epizy.com/pejobujezumopomatidaru.pdfIn PDF document text
    • http://vebagakid.onlinewebshop.net/44267573489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cbfcbd5-743b-4174-b059-589c8dc1154f/how_to_the_radius_of_a_circle.pdfIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_70011776e7d444e6b7657be5f4daee2f.pdf?index=trueIn PDF document text
    • http://sujunutab.atwebpages.com/20905853554.pdfIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_b1c7b1b5206f404d8342b337f1c82d9b.pdf?index=trueIn PDF document text
    • http://supidanerij.epizy.com/rockstar_full_movie_in_1080p_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d9c5bc-5f37-406b-9dd8-e52f3d7031d2/english_placement_test_answers.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_off0000f158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF158 5596 bytes
SHA-256: 47197898d0ab8fa7b5e6c926bbc42a2981537d695e581aac7c59ad0258086203
font_01_sfnt_off00010452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10452 10712 bytes
SHA-256: 9bc9722b45830e3897e2a32bcb59347275a1f962c4aa39a6e3590fbe88aa4ff7