Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1b32501af15622…

MALICIOUS

PDF

93.3 KB Created: 2021-03-23 16:35:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5e16d2e80224bc7b019f9f2a8e80ad53 SHA-1: 937b8adb4666d675a49a67c7ed1335ee98c7b561 SHA-256: 7b1b32501af15622b328f1b68b7ed9f70613402506b4dc6766c24c9981ae17f4
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

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://midufefew.ru/strik?utm_term=geometry+regents+reference+sheet+2019 PDF link annotation
    • http://snail-case.store/cisco_4200_series_router_pricekxmkr.pdfIn PDF document text
    • http://reactivaperu-2020.com/54821319670fw0j.pdfIn PDF document text
    • http://larekew.mywebcommunity.org/67101665746.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/calculus_early_transcendentals_7th_edition_answers.pdfIn PDF document text
    • http://dudoxanudito.scienceontheweb.net/refraction_of_light_at_plane_surfaces.pdfIn PDF document text
    • http://zuwazekanusur.mypressonline.com/muvitat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444100/normal_60147a734ee87.pdfIn PDF document text
    • http://liwitesuzemumex.sportsontheweb.net/plantas_angiospermas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_60307826cc016.pdfIn PDF document text
    • http://fawaxifiwuzodil.scienceontheweb.net/voguriban.pdfIn PDF document text
    • http://fofolep.mywebcommunity.org/victoria_bc_downtown_map.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/xajowu/the_practice_of_statistics_5th_edition_teachers_edition.pdfIn PDF document text
    • http://subogerilazelo.atwebpages.com/75393399602.pdfIn PDF document text
    • https://b1b1ed1d-a631-407f-b8a0-2f609481a9c2.filesusr.com/ugd/3e5895_d1720b224dad4774a0ec0b5d36d8cae1.pdf?index=trueIn PDF document text
    • https://76c87692-cca9-4651-be8e-de6412dad411.filesusr.com/ugd/fdad67_b4794ddd851848dca646e1e5432cf4ef.pdf?index=trueIn PDF document text
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_1ae90c91a7874ad8967ebbc7dfb0e2f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/40635259932.pdfIn PDF document text
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_6f7e4cbd57424864b4e97f967aad2daf.pdf?index=trueIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_5cc40f4462f74148b892e72004b8f58b.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12394 5668 bytes
SHA-256: 0e19a0ab26ebac471fa436134313e2282a000bc18a0818ef7af7fb33fc18038b
font_01_sfnt_off000136c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C8 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00013f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F56 11152 bytes
SHA-256: 79d2aa819f38d11f0797b068dc8bbab476863f30d3437d85899bd803dbfd3ba3

Open this report in the interactive analyzer, or submit your own file for analysis.