Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e212ecacee5e20…

MALICIOUS

PDF

81.3 KB Created: 2021-04-20 12:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c992aad9bf82087ba430257d1825ee9c SHA-1: e9cc157a10500ef0c6cce330b16ab7f775b9cbba SHA-256: 32e212ecacee5e20fcd0bfab379f69a2136d9fdde63aba501cc3779d9520fa85
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/strik?utm_term=dark+alliance+2+cheats PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496828/normal_5fe6c8a4c325e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454807/normal_603a717b6289b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484363/normal_5fd050ec833e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499633/normal_60380f3826037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_60175a60d0d7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392868/normal_5ff3b22be5e1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476766/normal_601db8b549370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_6022b4023bbfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_600f632c86170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411218/normal_6033165ddd762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491673/normal_605d857c45b58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448724/normal_605df3f3cf8c8.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/reflection_essay_about_how_quantitative_research_can_contribute_to_poverty_reductioncugze.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/xedewiwofesatefovutavesegkz6s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412160/normal_600326c745017.pdfIn PDF document text
    • http://erogan-oficial.site/agenda_imprimible_2018_gratisj5qod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410731/normal_5ff044d8c18c9.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/96df3838-a69a-4208-a2ee-e01618f38e08/what_does_tantra_feel_like.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10b177be-4813-4ac1-a15a-af9eaade25eb/who_was_a_fighter_in_the_bible.pdfIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_826b951ce78e413cb8b439b52238d490.pdf?index=trueIn PDF document text
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_87d23daa7b9b43d4a99d66f3eb730fd7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aa0cdd8-576e-4914-9064-7cc75fa5af37/jandy_lx_pool_heater_manual.pdfIn PDF document text
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_5db15767a7b5452d8cac9726459c9e9e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee2196dc-6561-4eab-97d6-3a9ef7e8d753/how_to_put_a_dishwasher_back_together.pdfIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_c5a9ae4471c64b37bdfd4bc50dd54995.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_off000100a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A8 5084 bytes
SHA-256: e4d74a6d15172038ce6f62bfa679d4f12d8401d018f96cfcca1d0066414aacb0
font_01_sfnt_off000111f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F1 10892 bytes
SHA-256: 143b01c775690c931020cf230b2653e9841199d195ec315f1d43b07ea44d482b