Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be82e54a5089d86…

MALICIOUS

PDF

77.7 KB Created: 2021-03-14 18:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: dadcf4eacaca912a8d950dddf59f2670 SHA-1: 0421100cdfa2d9723e43b8c63944563ad2af73ca SHA-256: 1be82e54a5089d862fe11fe9b02d6f393a0430e3d89e6a2137a1838856690ea4
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to external, potentially harmful, sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=genuine+honda+power+steering+fluid+vs+prestone In PDF document text
    • http://bluebadge-support.com/warhammer_40k_harlequins_codexlfvz5.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/descargar_imagen_iso_de_windows_7_gratis_por_megafipwz.pdfIn PDF document text
    • https://dazuvekojuj.weebly.com/uploads/1/3/4/8/134863877/2824554.pdfIn PDF document text
    • http://pss77.ru/bijetotm1td9.pdfIn PDF document text
    • https://wabirigiraziw.weebly.com/uploads/1/3/6/0/136017191/20ac95c8f017d8.pdfIn PDF document text
    • https://jabenawonidibe.weebly.com/uploads/1/3/5/3/135385032/xanenop.pdfIn PDF document text
    • https://fekobuwag.weebly.com/uploads/1/3/1/8/131858403/sidowewuw_gofomuwimed_dozuxosolu.pdfIn PDF document text
    • https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/rufokarawaweto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/dawunagamomimebodaj.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/mambo_no_5_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/43648529677.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/animation_books_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f30da4-8a27-4c25-91b3-a832432f1909/navazesikisapalamejukugos.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/datepicker_format_dd_mm_yyyy_swift.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/clicker_heroes_transcendence_guide_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/basetaxoxibibogodu.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/maplestory_m_dk_equipment_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/endometriosis_guideline_asrm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971ed3df-da4b-4cf8-8545-5bcd7eca4a74/best_dd_forgotten_realms_novels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/258e6b6c-1e92-4f11-b8f2-d9c0420ac0f7/34200457220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b261746-d94d-44a9-b760-d7bc87180c09/30659065066.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_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 5484 bytes
SHA-256: 3f5babe0d29ed7efd0da704d446b474e553c0c8b92c94fb6f3533499c823c04c
font_01_sfnt_off0001055e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055E 10544 bytes
SHA-256: c348057720f6f0b4086d3bdc2d9a57da96455248a72c5f421cdab903afe824b8

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