Malicious PDF — malware analysis report

Static analysis result for SHA-256 410c14726a683161…

MALICIOUS

PDF

78.6 KB Created: 2021-06-01 15:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 68666fd7db6e5735013a18c345ca30d3 SHA-1: b05824d6bec8d9655534246bf944e22301cf1a77 SHA-256: 410c14726a6831616093791d9c4f95def6ad6706cb1c46458beccb3f07d5f488
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://medvor.ru/pbw?utm_term=can%2527t+log+into+venmo+new+phone+number PDF link annotation
    • https://kuvitarige.weebly.com/uploads/1/3/4/0/134095916/ravivazazijujis-kabonolapugadij.pdfIn PDF document text
    • https://kumaneke.weebly.com/uploads/1/3/4/6/134682587/dajuzegozobani-tonamoki.pdfIn PDF document text
    • https://zetodimamewiwek.weebly.com/uploads/1/3/2/3/132302859/317ecf5966.pdfIn PDF document text
    • https://fidexirubopuzer.weebly.com/uploads/1/3/2/8/132815065/1953200.pdfIn PDF document text
    • https://latavulepa.weebly.com/uploads/1/3/4/4/134461708/xazujufiwi-jujadaziwajun.pdfIn PDF document text
    • https://febodume.weebly.com/uploads/1/3/2/8/132815732/giveliben_jovir_katimonareka.pdfIn PDF document text
    • https://sogekapi.weebly.com/uploads/1/3/4/8/134891770/df69282bafb4af.pdfIn PDF document text
    • https://kupalupatumer.weebly.com/uploads/1/3/1/8/131857031/polekal_rotojilig_kedemuzuniwasi_bodidoxitij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://memofemovo.pbworks.com/f/dragon_ball_z_shin_budokai_2_psp_iso_save_data.pdfIn PDF document text
    • http://garigor.pbworks.com/w/file/fetch/144424092/gavonurejep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e341416e-921c-4759-ad8f-7fa5f499db13/64184925996.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144420144/guerra_mundial_z_2_pelicula_completa_en_espaol_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d74feb2d-503c-4501-8ba6-5f3cab7efa3a/zopawidodudurow.pdfIn PDF document text
    • http://tusawijer.pbworks.com/f/psychology_4th_edition_schacter_launchpad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f29f2ba-e096-4365-8f79-fd0371573959/dungeons_and_dragons_essentials_kit_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64caa236-5ebf-4058-9bb0-7b750686c3d9/warhammer_40k_8th_edition_rules_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/889d871d-07f1-4c06-91e1-79d568bbc6b0/kimit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b25f4550-6c83-472e-8260-6cd9ab59c1d6/botimajurijatawisipifakib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df1292f-8194-483d-a25f-36b0713157f2/christian_books_for_couples_dating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f82875c0-7950-47a6-8069-71ef140fb45c/vosubasaporo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368542bd-84eb-4339-a71d-8b2e7d8eb2dc/easy_math_questions_with_answers_for_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9110cf26-b845-4edc-8346-0b7c5a08aae8/nttp_3-07.2.1_antiterrorism_force_protection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d3e31ea-d26b-4eca-a9f0-abdca0766390/what_is_ironic_about_atticus.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_off0000f67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67A 5288 bytes
SHA-256: 7f03a11fd790cf80e03f122ca54fd53f5041e8ba56c65426700329f200641317
font_01_sfnt_off00010860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10860 10588 bytes
SHA-256: 0689f7478775b1d10fc9fd6e80ad01636acc00a9a0dd17955c50843d12714b11