Malicious PDF — malware analysis report

Static analysis result for SHA-256 2319f8a2b5336470…

MALICIOUS

PDF

99.8 KB Created: 2021-03-17 07:12:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9d40d26d9149644e6fd6ce8933970ec1 SHA-1: d40db1c60f119cc6d64ef4702d056f72151a2fe9 SHA-256: 2319f8a2b5336470d6f2fc9e06de11828821b71915d86cef2a582edd9e77622a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file is flagged as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to a lab report.

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://dugedepap.ru/strik?utm_term=plant+pigments+and+photosynthesis+lab+report PDF link annotation
    • http://gordei2d.com/cryptocurrency_for_dummiesdqhsy.pdfIn PDF document text
    • http://mpvideo.org/jaxipirafojovabukuxiyc6jv.pdfIn PDF document text
    • https://cdn.sqhk.co/vojofarakiva/bjykByr/skiing_fred_versus_descargar.pdfIn PDF document text
    • http://itnegozio.info/617063583253ppqa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481052/normal_602a4793552f4.pdfIn PDF document text
    • http://artemk.ru/kaukulan_ng_panghalip_panao_worksheetswrwha.pdfIn PDF document text
    • http://instofficial.online/desimoziseguduwoxoziwifesggb3j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5fd7ba90cdec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_5fdc17cbcd508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471099/normal_6018c328c2587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404725/normal_6027f00588561.pdfIn PDF document text
    • https://cdn.sqhk.co/linerutinew/wgdgehc/78604250551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444626/normal_601afcb393f3b.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/ca10523c-0a4d-4325-8528-89e461bed90a/tools_used_by_program_managers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acf8657c-50e5-477e-abab-38fdca2fc0d0/modutifuferudewis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95ab89d6-9ca7-469c-80bf-1e0a359ef559/92165274757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5067e29-ee4a-45cf-8c88-b5094ebf6cf3/financial_shenanigans_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8c1ab0-0b47-41c9-b8ed-f9bb833e05bd/61555143630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b647d6-c5b0-4bc7-ac60-e0bad0ac7c3a/fleck_5600_water_softener_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c400c38c-ac1a-4f23-beba-b39fec9a202a/20391904894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98b433f7-7117-46a0-86fb-faafd5f355c6/minn_kota_ulterra_remote_control.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_off000148c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148C2 5616 bytes
SHA-256: 36a975f6c602a42b273480b3da39088f1feabb874d9e5c3f0c45fcb43a68e46a
font_01_sfnt_off00015bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BAE 11472 bytes
SHA-256: 695f9eda07f3d046fcfefe9fca7712c5d9c1d57c08908ef0850905be3659ae1f

Open this report in the interactive analyzer, or submit your own file for analysis.