Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c278605a0af420b…

MALICIOUS

PDF

76.4 KB Created: 2021-05-06 15:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 82baea01f5fbebb635eed182ddd35828 SHA-1: f63211691a8bf65c6880ef95bffcb7edc6edd6ae SHA-256: 6c278605a0af420bf8a1199802bac1ac26227a7a17b252a98743d93451842735
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, disguised as a recipe. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also flagged it with high confidence, suggesting a malicious intent to redirect users to a harmful site.

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://mezovuduw.ru/strik?utm_term=how+to+make+french+steak+tartare PDF link annotation
    • http://senaxemuj.iblogger.org/mindfulness_journal_prompts_for_high_school_students.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464530/normal_604dd51c1ad90.pdfIn PDF document text
    • http://fujalizipuderi.22web.org/99257597019.pdfIn PDF document text
    • http://kitakusiwudaj.22web.org/cdf_and_difference.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_600a27e936cd3.pdfIn PDF document text
    • http://dezurifu.iblogger.org/how_do_i_search_by_image_on_my_iphone_2020.pdfIn PDF document text
    • http://farusagomuwig.iblogger.org/monitoring_and_evaluation_tools_and_techniques.pdfIn PDF document text
    • http://meveteletav.22web.org/mawiz.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/284cc170-f5b5-401c-adc5-4e052e20a360/tajweed_rules_in_tamil_download.pdfIn PDF document text
    • http://desebavufix.rf.gd/49759729512.pdfIn PDF document text
    • http://tipesajiwe.epizy.com/the_pardoner_s_tale_summary.pdfIn PDF document text
    • http://supanofarex.epizy.com/josquin_des_prez_ave_maria_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a5881c-4de5-4a4b-bd54-d5e42cf10634/71648725210.pdfIn PDF document text
    • http://xinovedef.rf.gd/bituwimatonojejajikivixa.pdfIn PDF document text
    • http://xamejekos.rf.gd/sevinex.pdfIn PDF document text
    • http://felubumasosazi.epizy.com/99377754776.pdfIn PDF document text
    • http://xirugole.epizy.com/85169695315.pdfIn PDF document text
    • http://wovogaxix.epizy.com/how_to_spot_a_fake_colt_1911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3041220c-8fef-40b1-8b5f-ace41031e4bc/68643576257.pdfIn PDF document text
    • http://gezibetaw.epizy.com/jufumivedazakipin.pdfIn PDF document text
    • http://jomewudixaf.epizy.com/giwizipapotuzivali.pdfIn PDF document text
    • http://puzexexaniledow.epizy.com/accidents_in_nj_reported_today.pdfIn PDF document text
    • http://dibulazovila.rf.gd/denibesutawixifiw.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_off0000ec98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC98 5204 bytes
SHA-256: 04dce48e5eaba3266bc45c50d4b589c4c4fc3a536e2bebc85cc05fa7a9fb1e1e
font_01_sfnt_off0000fe32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE32 11264 bytes
SHA-256: 59c3d3bdc79b466c00a9b1ed574963521ec56d709dfe616e08a6c3a687e1ff87

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