Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7eac22f233ba49e…

MALICIOUS

PDF

79.7 KB Created: 2021-04-25 15:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c00f1222dc27492f11eaa00af0093b2e SHA-1: 3de4b72bc5d6294dc1bdfb9e18dd7a973962c003 SHA-256: f7eac22f233ba49e3da11dc319f9eb1c21851ef63435b524cbc182118f881fc4
186 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. While no scripts were extracted, the PDF structure and numerous external URIs point towards an attempt to redirect users to potentially harmful content, likely for phishing or malware delivery.

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://fokemale.ru/strik?utm_term=nikon+fg-20+film+loading PDF link annotation
    • https://vuwuzujos.weebly.com/uploads/1/3/2/7/132712237/vukusixuzuz.pdfIn PDF document text
    • https://dilimeriju.weebly.com/uploads/1/3/5/3/135351787/paxizilu-zajajimerisumus-fisubometi-kavaxulonan.pdfIn PDF document text
    • http://wewudiwiwojob.22web.org/nadebaxunelidepelugi.pdfIn PDF document text
    • https://xibigulekin.weebly.com/uploads/1/3/0/9/130968960/bf1111ae2d.pdfIn PDF document text
    • https://mizovitima.weebly.com/uploads/1/3/4/2/134266674/9e9ac37b2.pdfIn PDF document text
    • https://livubefelamujir.weebly.com/uploads/1/3/4/8/134899239/piwilusasuziwokik.pdfIn PDF document text
    • https://lixudovu.weebly.com/uploads/1/3/4/5/134598000/zosiwixewinefo-sakalagejuxaja.pdfIn PDF document text
    • https://temonobulap.weebly.com/uploads/1/3/4/5/134592988/5146396.pdfIn PDF document text
    • https://tajudazu.weebly.com/uploads/1/3/4/3/134328852/bivukanelulijomavoro.pdfIn PDF document text
    • https://tozikogok.weebly.com/uploads/1/3/5/3/135330875/wijik.pdfIn PDF document text
    • https://lezojefob.weebly.com/uploads/1/3/5/3/135319065/5016814.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fukanabe.epizy.com/acer_n1996_motherboard_drivers_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/074ec5ee-a95b-485b-b9b7-d763a39dd78f/bodegafomupiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dd85d24-c9df-41f6-8761-239830155883/how_do_i_reset_my_admiral_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd27b37-92e7-4188-b7ae-613ae042aa23/melulebajaxiboku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee40b83-52bf-4a9f-9bd6-f8528d4f63c2/xugivivovifidajat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a73e6c86-d059-4c5f-aebe-d8e3ca4a3deb/48138263766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b07bd9a-b807-4423-a811-ea41f91d4406/fofemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd11ce3-db36-4a69-be96-1a2aa6e813d5/do_you_have_to_replace_both_ink_cartridges_canon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0989508-c556-4c98-af72-6caf75918ae8/bassanio_the_merchant_of_venice_character_analysis.pdfIn PDF document text
    • http://woxepakaj.epizy.com/key_largo_hump_fishing_report.pdfIn PDF document text
    • http://tajazeruviv.rf.gd/school_uniforms_stores_manila.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_off0000f9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A2 5292 bytes
SHA-256: 280e7217378bda976ce9d9179cffac5f38545e1acd49c63e24eef92d9ea05ae5
font_01_sfnt_off00010bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAB 10724 bytes
SHA-256: 8b49f234ae3323dd74f4dac925c23b0adbdd0e41c6667d0fdb0f866590c5c913