Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d5f91269126161…

MALICIOUS

PDF

73.2 KB Created: 2021-04-26 01:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5f101b9336441236682bc9ea824cc000 SHA-1: 7135f0f491c52690988a7909f0aa39ab7be639fe SHA-256: 93d5f91269126161ed510b108d95d8ceeeee365a041decfc87dc2f08f66799e0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://seumenha.ru/strik?utm_term=does+the+mazda+cx-5+have+remote+start PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479938/normal_605700fa74168.pdfIn PDF document text
    • http://kinoxca.xyz/nokosobikobelizo815pm.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/11712944843.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482399/normal_5ffd4a5a68d0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488817/normal_5fef6b7877236.pdfIn PDF document text
    • http://insurancesouk.com/my_little_lamb_cradle_n_swing_instructionsu98au.pdfIn PDF document text
    • http://fufirewavit.getenjoyment.net/76328377233.pdfIn PDF document text
    • http://xemakaze.mywebcommunity.org/rifoworirugazafuf.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/c5fb9f1a-7488-45e4-b939-02d800963a32/basic_academic_writing_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b03f38-a378-4d2e-8181-1471d26a678c/is_there_a_walmart_near_me_open_24_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fba66a0-389d-4c77-aa5c-c08bc986af3d/what_is_the_salary_of_hardware_engineer_in_india_per_month.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c654ec5-c28e-4ccb-8004-bda244c56be9/34463122574.pdfIn PDF document text
    • http://kexomun.myartsonline.com/17512773021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea8c099-781f-4aa1-aea6-07d3850bc5e5/duromax_4400_generator_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64bc8c76-0540-4723-b47b-77e856a6a4ee/interior_designer_job_in_kolkata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65f9e939-d492-4273-bdc0-d7f29f4cab19/80349687459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92a9e53-3a9a-4a2f-8931-525dbec4077c/what_is_the_symbol_for_dow_jones_industrial_average.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07B 5480 bytes
SHA-256: 86aac5e09f41a9ac0981845a49497b531e6cae6ea147e6fda7e766249850b31c
font_01_sfnt_off0000f312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF312 10740 bytes
SHA-256: 5fa8d43c3d780b8377d42bb4f97eeaa3cecba609fa8561b027c50aa904da596f

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