Malicious PDF — malware analysis report

Static analysis result for SHA-256 437e0c585665c34a…

MALICIOUS

PDF

67.0 KB Created: 2021-02-19 13:45:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9ec188086e52a9ca6a051d2183d45ed2 SHA-1: 5dd7f612648499b185168b0f8353c86f0e5356df SHA-256: 437e0c585665c34a73658b2c3f5033b1e738952632043a724651762ca833d487
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-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://crophysi.ru/strik?utm_term=delete+mental+ray+nodes+maya PDF link annotation
    • http://petrol-v-pol-price.site/alta_mar_netflix_parents_guideup728.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/lubosesojikatoresonnum5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476566/normal_5fd064f084578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409425/normal_5fe91b4ddfe9c.pdfIn PDF document text
    • http://all-gopro.com/10._snf_matematik_ders_kitab92anq.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/gT5wmhc/42715055195.pdfIn PDF document text
    • https://cdn.sqhk.co/vorowobenune/2HhcKgg/brawl_stars_opening_1000_mega_boxes.pdfIn PDF document text
    • http://jorodija.iblogger.org/59680699149.pdfIn PDF document text
    • http://persequenteamsohbet.com/jebozeguvinikagobipe19i6a.pdfIn PDF document text
    • http://varietystore.website/fagexibajewxpt4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vegozuw.epizy.com/xifudidiribebosarug.pdfIn PDF document text
    • http://kepipejesa.epizy.com/asrb_application_form_2019.pdfIn PDF document text
    • http://xifetofaramil.rf.gd/97149042447.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_off0000c845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC845 5072 bytes
SHA-256: 538863b2040f3629c7f560b6cc3510a6bf48a3edb549d8ecbd2a137fa360d999
font_01_sfnt_off0000d975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD975 11220 bytes
SHA-256: 3aec81c8ffbd63f4f274a90b6c236113859de19e6cd79b0d647613b2cbc9a817

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