Malicious PDF — malware analysis report

Static analysis result for SHA-256 d424d8285e0ee4e2…

MALICIOUS

PDF

76.4 KB Created: 2021-04-19 18:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 02dbd429b1646a3fb0efacb538e90c05 SHA-1: 84f1eb66a2b7ff4e36c45ffa7c6e855fe89d6605 SHA-256: d424d8285e0ee4e26428438447975689fd2f42f37ed00668aa1a4bddfc22dbf6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a spearphishing attachment, likely leading to further compromise.

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://resalured.ru/strik?utm_term=bissell+cleanview+bagless+vacuum+filter PDF link annotation
    • http://modarab.mygamesonline.org/75575052677.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/jeZUC28/14698712847.pdfIn PDF document text
    • http://lazokiwumemo.mygamesonline.org/activities_worksheets_esl.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/demian_book_pages.pdfIn PDF document text
    • http://xogovegakim.22web.org/hyperion_insurance_group_ltd_annual_report.pdfIn PDF document text
    • http://fuwiduwoxobol.mygamesonline.org/8476525400.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/washington_capitals_schedule_2020.pdfIn PDF document text
    • https://bogekivusuwi.weebly.com/uploads/1/3/4/6/134604255/gejede.pdfIn PDF document text
    • http://jawunefuda.mygamesonline.org/21560766375.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/2fhicig/33668693106.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/Gjc3TrX/dopasarimijisetixi.pdfIn PDF document text
    • https://kenazago.weebly.com/uploads/1/3/1/0/131070597/mojij.pdfIn PDF document text
    • http://wamipivifubape.sportsontheweb.net/whirlpool_french_door_refrigerator_not_cooling_properly.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/azBgduk/v_moda_m200_head_fi.pdfIn PDF document text
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/1c69c103cf9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligoroxenafof.atwebpages.com/sapuxenideloxalizi.pdfIn PDF document text
    • http://nolivajujereram.rf.gd/canons_of_professional_ethics_philippines.pdfIn PDF document text
    • http://muwuvago.atwebpages.com/shear_force_and_bending_moment_diagram_table.pdfIn PDF document text
    • http://sagulisopopu.epizy.com/ap_module_grade_10_teacher_s_guide.pdfIn PDF document text
    • http://likijanima.epizy.com/gujilugegutasizev.pdfIn PDF document text
    • http://xarugipofe.epizy.com/how_many_questions_are_on_the_ascp_phlebotomy_exam.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_off0000ecf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF3 5540 bytes
SHA-256: c910e00170886f3328d183f9f67fa6091a4c169b1df6d933e6b3c6407dbb0103
font_01_sfnt_off0000ffd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 10600 bytes
SHA-256: c6f0012ad4c471a381be3b758d3462b98944e08d6959a85c2bd378110f9a711e

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