Malicious PDF — malware analysis report

Static analysis result for SHA-256 924a1fbcc77de2ba…

MALICIOUS

PDF

72.8 KB Created: 2021-03-31 04:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8cea39ac10e4c3f3ae64f1c981c10eae SHA-1: cf774c0fea1611076d87d61f55a8548cff959f44 SHA-256: 924a1fbcc77de2ba0e0e3e4667e0a8fc2cb2d2e988412a882622c97696d0d576
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable or suspicious domains, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of techniques used to redirect users to malicious sites.

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://xajibur.ru/strik?utm_term=maxwell+medical+reference+pdf PDF link annotation
    • http://gejesixave.scienceontheweb.net/capitalism_and_socialism.pdfIn PDF document text
    • http://pafowitowa.medianewsonline.com/biostatistics_in_public_health.pdfIn PDF document text
    • http://bitalotava.scienceontheweb.net/4819390887.pdfIn PDF document text
    • https://koxowuberes.weebly.com/uploads/1/3/1/3/131379375/gopudeduloro.pdfIn PDF document text
    • http://tadosuzewamu.medianewsonline.com/pofufivisibule.pdfIn PDF document text
    • http://ditilage.22web.org/android_aapt_error_attribute_not_found.pdfIn PDF document text
    • http://takaweri.mywebcommunity.org/39292729669.pdfIn PDF document text
    • http://beduzevitugok.mypressonline.com/dumuredibuzamosuburas.pdfIn PDF document text
    • https://lopatitegadusi.weebly.com/uploads/1/3/5/3/135311006/dogebi.pdfIn PDF document text
    • https://sanevofodi.weebly.com/uploads/1/3/0/9/130969150/7850363.pdfIn PDF document text
    • http://gibelepij.scienceontheweb.net/pares_biomagneticos_de_parasitos.pdfIn PDF document text
    • http://gazizelasama.getenjoyment.net/67587757471.pdfIn PDF document text
    • http://ludoviguboxulu.22web.org/sketchup_free_download_64_bit_2016.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozixexegaliwe.rf.gd/jikaf.pdfIn PDF document text
    • http://nizowozutagele.atwebpages.com/36579039934.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/barron_s_regents_exams_and_answers_algebra_1.pdfIn PDF document text
    • http://zilisugifep.epizy.com/12x20_shed_plans_free.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/saurastra_samachar_bhavnagar_download_today.pdfIn PDF document text
    • http://kabumosubeno.epizy.com/35106110248.pdfIn PDF document text
    • http://laxolagodofomug.onlinewebshop.net/65895286973.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_off0000dcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB3 5288 bytes
SHA-256: 306b52e9e969d1a90c191bc3dcc6db1ff552d6acc350b2b42782e371e4a7cb8a
font_01_sfnt_off0000eebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBF 11660 bytes
SHA-256: 991267aeab33a2dd028f7ca7c76cb9cecc8491c0204f7600041799c5c42b40b2

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