Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f2e03478f5ee20…

MALICIOUS

PDF

70.5 KB Created: 2021-02-27 17:38:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2fc3654107bcd2bf539adc81cb51bc75 SHA-1: 25b37328e5f49297b9db01946acc4dfeae221a66 SHA-256: b6f2e03478f5ee20af96895e759099e12343b432205628f19ec1ca4a568d3a04
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content, likely for initial access via spearphishing.

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://xajibur.ru/wix?keyword=ronnie+capps+guide+service PDF link annotation
    • http://fotonagosuslugi-01.space/kacheri_aarambam_songs_mp4sxvms.pdfIn PDF document text
    • https://rupimobo.weebly.com/uploads/1/3/4/8/134891389/891610.pdfIn PDF document text
    • http://usejus.pro/what_are_the_5_types_of_sense_receptors3fzee.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/aVIjjaA/3489057354.pdfIn PDF document text
    • https://xitititoludazo.weebly.com/uploads/1/3/5/9/135987602/vivazuburivo.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/wichc3W/papopafa.pdfIn PDF document text
    • https://cdn.sqhk.co/zarifabidit/hihhcjf/dictionary_english_to_farsi_free_download.pdfIn PDF document text
    • https://xadixolikiz.weebly.com/uploads/1/3/1/3/131380305/3645489.pdfIn PDF document text
    • http://pokavitapizinuv.iblogger.org/dujukitelawavageve.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvazuginu/5Iqhiie/parks_and_recreation_special_watch_australia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zoxizagujaniru.epizy.com/instantiating_a_template_class_c.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/37019559207.pdfIn PDF document text
    • http://badivisixeg.epizy.com/arbitrary_constant_in_differential_equation.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/gubakidogifobekutajinoxuw.pdfIn PDF document text
    • http://loreforozupole.epizy.com/answer_key_mpsc_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/best_guitar_tabs_for_beginners.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_off0000d8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CA 5276 bytes
SHA-256: 16fe8585f65da4db970301c2d1e66f0233b70323d612e5f0b9aa76ef82ebfe13
font_01_sfnt_off0000ead8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD8 10040 bytes
SHA-256: 3ae45f54164c126b7d73e78bbfa71be49c93a90351007382f3b6b8a1e2c34e45

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