Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb3dcbdde232fba…

MALICIOUS

PDF

80.0 KB Created: 2021-04-01 14:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8274fbf69fb76724463e89aa254d4448 SHA-1: 82cbad7147e6bda0b4b4c7832d0d54725e2fd8e2 SHA-256: ccb3dcbdde232fba0f01541d896df5cfa2a937db5a86e1e44c2ddea128d546ee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://crophysi.ru/123?utm_term=bengali+new+song+2018+free PDF link annotation
    • http://trokot-roznica.xyz/wow_classic_mage_leveling_guide_hordewy7v6.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/cirugia_cardiovascular_definicion.pdfIn PDF document text
    • http://govnosiakxws.online/grounded_theory_vs_phenomenology_vs_ethnographyoy63z.pdfIn PDF document text
    • http://fogukupututi.22web.org/susomidami.pdfIn PDF document text
    • http://napufokotipo.getenjoyment.net/9530590124.pdfIn PDF document text
    • http://sibogufurab.medianewsonline.com/audio_visual_teaching_aids.pdfIn PDF document text
    • http://zebozewazogaso.scienceontheweb.net/cambridge_primary_revise_for_primary_checkpoint_english_study_guide.pdfIn PDF document text
    • http://nukapag.getenjoyment.net/business_plan_restaurant_bar.pdfIn PDF document text
    • http://kevifiregerufug.scienceontheweb.net/99767535237.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/metro_map_istanbul_2020.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/la_divina_comedia_quien_fue_el_autor.pdfIn PDF document text
    • http://pasetbs.xyz/xagunebarivupugujebiz3v8jh.pdfIn PDF document text
    • http://meetsoda.pro/sibavajobizofufutusulaj3u47f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bitixojofesozi.rf.gd/xurowepasixedij.pdfIn PDF document text
    • http://vixadit.rf.gd/sifuzujos.pdfIn PDF document text
    • http://xuramilipadig.rf.gd/83986720661.pdfIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_dfcfdb5c93404f118826bcccd1df620a.pdf?index=trueIn PDF document text
    • https://4eb3a9b5-ca6a-4b2a-896e-878abc754f3b.filesusr.com/ugd/f1ab86_a9976dd357d24000ba80d449a03d8fbc.pdf?index=trueIn PDF document text
    • http://tudavoje.epizy.com/antibiotic_resistance_ielts_reading_answers.pdfIn PDF document text
    • http://jezuboteseg.epizy.com/tewedikonulozalajeke.pdfIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_6e825699f7824cd7a439bdbc7af6f7df.pdf?index=trueIn 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_off0000fd43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD43 5596 bytes
SHA-256: 50415522f052829953812807ca358360c80405b592bd8f798504fc2cddf62ac2
font_01_sfnt_off00011076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11076 10428 bytes
SHA-256: 06278cbb8afa1b56ed6f718fbd90f6d37ac172b42e9b3b1d38bf2827c18d29c8

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