Malicious PDF — malware analysis report

Static analysis result for SHA-256 91cd702e417be559…

MALICIOUS

PDF

68.5 KB Created: 2021-02-27 13:18:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b3c84a5ae716735be3e67f12047a54b4 SHA-1: 725929a42499a161ea4fbccbe8bf697964f8713a SHA-256: 91cd702e417be559ca2a20985a2542a8ed3ad82d61e89acc913ba5f07d6147cc
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a 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 URLs point towards a lure to external malicious content.

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://lozipotod.ru/award?keyword=casio+sgw-100+change+strap PDF link annotation
    • https://cdn.sqhk.co/notenirikev/Ojemji5/nitakabamigerexugowuga.pdfIn PDF document text
    • http://namunogetivij.iblogger.org/ruhs_post_bsc_nursing_form_2019.pdfIn PDF document text
    • http://rabuvuz.iblogger.org/chief_architect_x11_crack.pdfIn PDF document text
    • http://busibear.com/minamemumakagumidiziz9run0.pdfIn PDF document text
    • http://mon-cmb.best/nhl_network_live_stream_freez8rjm.pdfIn PDF document text
    • https://jowidirususonin.weebly.com/uploads/1/3/0/7/130775515/medifixoxug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_5fe6e29c58ae1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nikonexusopuja.epizy.com/how_much_is_darren_hardy_worth.pdfIn PDF document text
    • http://zokitidekav.epizy.com/hoss_intropia_size_guide.pdfIn PDF document text
    • http://susosutudufat.rf.gd/1285985175.pdfIn PDF document text
    • http://lobivovakebala.epizy.com/capital_inicial_acustico_nyc.pdfIn PDF document text
    • http://lemujiv.epizy.com/gojitizivisumarivexu.pdfIn PDF document text
    • http://gukasitaxe.epizy.com/luzaregan.pdfIn PDF document text
    • http://sunosazogefot.epizy.com/harry_potter_und_der_stein_der_weisen_download_film.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_off0000ce1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1A 5388 bytes
SHA-256: a6ee7270be0dbfe4b216d212fe868098dee28704d4d8ba16c16398e9089cfb6a
font_01_sfnt_off0000e081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE081 10640 bytes
SHA-256: 16e7ff2ff0fe06d9816d4fe051ad96d89c8d8fcc59afe3776dc88ff78c1ff963

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