Malicious PDF — malware analysis report

Static analysis result for SHA-256 601abed1cc6eb1ea…

MALICIOUS

PDF

92.7 KB Created: 2021-05-13 12:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 49898aa2d3cbc0ffaa5edf17dcaa3f8f SHA-1: aee1c3a73e0b4fa0154bb877fd8de4e4d12a4cf9 SHA-256: 601abed1cc6eb1ea84bdd3c544feb40a7edca4c6f385994310c819a86712651c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. The embedded URLs and the heuristic PDF_SEO_DISPOSABLE_LINK_FARM suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=python+tutorial+for+beginners+full+course+2019+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387817/normal_5fc592567a091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404108/normal_5fd60b7695948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414680/normal_606a32f9aa5ac.pdfIn PDF document text
    • http://xexejevun.medianewsonline.com/98487580907.pdfIn PDF document text
    • http://makamar.tech/download_age_of_empires_3_serial_keyeapuc.pdfIn PDF document text
    • http://about-igsupport.com/food_safety_jobs_near_me6imwf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424405/normal_5fe2052253e8f.pdfIn PDF document text
    • http://rixanemusijod.mywebcommunity.org/7179678464.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/88982484134oj31c.pdfIn PDF document text
    • http://suberubepuparo.getenjoyment.net/systematics_biology.pdfIn PDF document text
    • http://clipshd.design/gospel_of_judas_barbelohk81m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495413/normal_604d790827723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_606152931f8ae.pdfIn PDF document text
    • http://jarevine.mywebcommunity.org/toyota_camry_2020_white_pearl.pdfIn PDF document text
    • http://kudretbozaci.com/eleven_rack_editor_will_not_open_mac24281.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/90796119019.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/zasib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7329fc2-cd65-43fe-a0e0-dae8ef5d8cec/nanagenixapadubozi.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/tutoriel_arcgis_10._5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ab3700-4c99-4ab2-9cec-f2c1c22c3af8/mirro_pressure_canner_jiggler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc72a6a-4947-433c-b3ee-344daa3a2e90/que_es_una_foto_satelital.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBE 5868 bytes
SHA-256: 964226bd52032709314138d4d102dcb318b4ce3cb7e67c77e5cb637e87d763fb
font_01_sfnt_off000132b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B9 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00013b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B47 12140 bytes
SHA-256: ecf20a71230fd4c532dca0f7a3b485e6d60f08092ffb72eeb4639641ed08944a

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