Malicious PDF — malware analysis report

Static analysis result for SHA-256 089295a92abfbc92…

MALICIOUS

PDF

104.5 KB Created: 2021-05-27 18:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 605403901cfe42073b2e7431fd9181cd SHA-1: 80ac0963079c31a8080a8264203a938bb7c1c2c1 SHA-256: 089295a92abfbc92acd53588c90dad11925bacc0fefab2d0cac13ff988214121
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with many pointing to disposable hosting services. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=wizard+kelly+full+face PDF link annotation
    • https://jibunomo.weebly.com/uploads/1/3/5/3/135348462/zolimajexulagur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379032/normal_603c75a2239a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500882/normal_5fcbc633b2e1b.pdfIn PDF document text
    • https://bapoxipen.weebly.com/uploads/1/3/4/6/134684349/90a3c2ea24560.pdfIn PDF document text
    • https://tetaretutu.weebly.com/uploads/1/3/4/8/134872422/depibobiju.pdfIn PDF document text
    • https://zunelejodimoje.weebly.com/uploads/1/3/4/5/134526095/fazasugiba.pdfIn PDF document text
    • https://bewotababuruga.weebly.com/uploads/1/3/1/1/131163836/notokupirolukozovaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_60213f2adeddc.pdfIn PDF document text
    • https://gubetixe.weebly.com/uploads/1/3/4/3/134314982/6950364.pdfIn PDF document text
    • https://ralakugifobiw.weebly.com/uploads/1/3/4/5/134589758/tidupazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_603c3165a58e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382621/normal_5fce8c8d2ab21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_602de5b033de4.pdfIn PDF document text
    • https://dozumudokasalog.weebly.com/uploads/1/3/4/9/134902229/gafuloverana_pukod_fowopuxi.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/12b7b417-c23a-4f7b-b40b-1f97563f3637/singer_confidence_quilter_attachments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b00fd55-7143-4a55-9a1c-cd9b5eb1c82b/paragraph_writing_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12c7b88b-bc8a-495c-b3af-97452e178683/57005815580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586073ef-243c-44c6-a226-49b37c95fd70/divergent_4_movie_download_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/282aba42-9da6-4166-807b-8b26cc138673/bose_universal_remote_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3abf9d83-45fa-4cc8-ae66-2c989d658ef7/what_are_the_general_questions_for_an_interview.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_off00015209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15209 5064 bytes
SHA-256: de306d6c197a5ef34697f2c798a372f3e4cf401e15fbe9f56a1f143e0a59ca1c
font_01_sfnt_off0001637b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1637B 19472 bytes
SHA-256: 22acb7f721d93727bdde2d252c41a9b230daaa6101aafa34e87632359c44d50f