Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1780a3dd7eb3305…

MALICIOUS

PDF

66.3 KB Created: 2021-02-18 15:59:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c28f4d757422a32db8e37eba439703a6 SHA-1: 3336c1f3e3756b2ab071c9adefe01f1a9ab66bf5 SHA-256: e1780a3dd7eb330544c877b27da8b8c1b3f39d2d85810fec744ba5e583eff29e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=advantages+disadvantages+of+laser+printers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459469/normal_5fd7040400603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_5fe80ab9d2441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5fd7f7f31c052.pdfIn PDF document text
    • https://digojumowixev.weebly.com/uploads/1/3/5/9/135989627/wavuge.pdfIn PDF document text
    • http://difavusimope.iblogger.org/camera_fv_5_crack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424692/normal_6015dac5c6140.pdfIn PDF document text
    • https://tirotulesi.weebly.com/uploads/1/3/4/8/134849952/fec82530ca328.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/palevijuj/acca_f6_taxation_study_text_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/24192012728.pdfIn PDF document text
    • http://wimifus.rf.gd/static_and_dynamic_character_worksheet.pdfIn PDF document text
    • http://ruvowepager.epizy.com/diccionario_teologia_biblica.pdfIn PDF document text
    • http://kofupugixujodin.epizy.com/amines_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/sipeseputagomobafeli.pdfIn PDF document text
    • http://sujemitusosida.epizy.com/87615004337.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/azur_lane_mod_apk_2019.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_off0000ca55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA55 5256 bytes
SHA-256: 5beb4ca196fdaf66587a332bd33e80fcdc6cc48a97a5cf579cf15376cd6f7b75
font_01_sfnt_off0000dc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC52 9392 bytes
SHA-256: 26517c3665cd0d2f0843d008646a638fdc041de1fea2c4a1a7c8f16074b3af48