Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be26b6585b4edd4…

MALICIOUS

PDF

73.4 KB Created: 2021-06-03 04:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 27b1deae96c87a2043f4378ccfcb7e03 SHA-1: 6ac07b9813ab28f0b46237027cabeab1b5b4c99f SHA-256: 7be26b6585b4edd40593883dea7e1a2e07ae27f01e4db747a24a483ab19b8a65
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://smidgel.ru/pbw?utm_term=banana+bread+game+triple+demo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370778/normal_605fa1c5a7975.pdfIn PDF document text
    • https://daxekofaji.weebly.com/uploads/1/3/1/6/131606395/bf5f9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392457/normal_60212b7876fc8.pdfIn PDF document text
    • https://wotujajatedigi.weebly.com/uploads/1/3/5/2/135295120/xokaperepotiduwawado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_6059b979b92b5.pdfIn PDF document text
    • https://nirawulef.weebly.com/uploads/1/3/4/3/134324477/87144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450889/normal_60628b049ce03.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/3f5c0694-d676-44e6-be68-f72c8da5908b/the_hobbit_hindi_dubbed_720p_movie_download.pdfIn PDF document text
    • http://jifesepapo.pbworks.com/w/file/fetch/144441951/waranugakuxozilef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ca64a2-c809-469b-9164-1ab9e881dc72/cajas_de_carton_symbols.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/jdsu_hst-3000_manual_espaol.pdfIn PDF document text
    • http://gosirata.pbworks.com/f/jesubodotogekilomenuvuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/419afb09-d9ac-4dec-a47f-086d93deafa4/how_many_nicholas_sparks_books_have_been_turned_into_movies.pdfIn PDF document text
    • http://wuwolufit.pbworks.com/f/how_to_replace_bissell_powerforce_helix_turbo_belt.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/w/file/fetch/144440622/tebikedad.pdfIn PDF document text
    • http://jizakatum.pbworks.com/f/valor_absoluto_y_valor_relativo_ejercicios.pdfIn PDF document text
    • http://gamaxidad.pbworks.com/f/envision_math_2.0_grade_7_teacher_edition_volume_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586d6c7b-d5dc-49f2-89ce-64dae2bf8441/11383538566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24453f9d-e324-4669-977d-2c17c91f5004/84430834822.pdfIn PDF document text
    • http://kelivesas.pbworks.com/f/is_700_divisible_by_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0375df4e-7939-4051-ba4a-b78a0180cb07/system_requirements_for_adobe_premiere_pro_and_after_effects.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_off0000e206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE206 5292 bytes
SHA-256: fd0593801d133204eafc695673ffdeed37aba598af2a1a6fd6087f5d303c54e6
font_01_sfnt_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 10780 bytes
SHA-256: b429ca6d71be5cf3f6a50b7898a590e547ee8cd5980afafd080d9a7569b78dd4