Malicious PDF — malware analysis report

Static analysis result for SHA-256 e360e8868eb496fc…

MALICIOUS

PDF

64.2 KB Created: 2021-04-04 07:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 100d86ecd45e6d84c723f6837727e591 SHA-1: 2d539f292a044ca4cf775bc70bd24f8a9b917bde SHA-256: e360e8868eb496fc0fd8cde5e8431dbdd99bb174846c5c52fb2debec6729f53c
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The document body is heavily obfuscated and unreadable, but the presence of external URIs and the overall structure strongly indicate malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=troy+bilt+tb360+carburetor PDF link annotation
    • https://bizitaninajoki.weebly.com/uploads/1/3/5/3/135316521/topusigaxo.pdfIn PDF document text
    • http://xuwamamesatopa.22web.org/escape_room_2_level_11_answer.pdfIn PDF document text
    • https://cdn.sqhk.co/bodujemep/k37NR99/pukinogakoregafasuzarowu.pdfIn PDF document text
    • https://taxefijiduru.weebly.com/uploads/1/3/5/3/135311915/lixebimo.pdfIn PDF document text
    • https://donelodef.weebly.com/uploads/1/3/5/4/135401433/puwopurapasorepoda.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/eicjiW9/flying_jatt_english_subtitles_free_download.pdfIn PDF document text
    • https://gisafonenum.weebly.com/uploads/1/3/5/3/135323636/6509981.pdfIn PDF document text
    • https://nulowuze.weebly.com/uploads/1/3/4/6/134614321/6242194.pdfIn PDF document text
    • https://cdn.sqhk.co/lopijikuvi/LibThgD/51241668633.pdfIn PDF document text
    • http://vexasefagi.scienceontheweb.net/fonetica_de_las_vocales_en_ingles.pdfIn PDF document text
    • http://lojuxaga.mywebcommunity.org/mosfet_biasing.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/jebupofedijakuk/40161737657.pdfIn PDF document text
    • http://kadekosaraf.epizy.com/disregarded_entity_and_1099_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/dominions_4_ashdod_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/54658701775.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_off0000becd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBECD 5264 bytes
SHA-256: 4a3bd44a92cd9642591e0406f1df749e8cc06ac02e09a87f935a02e950508cba
font_01_sfnt_off0000d0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C7 10296 bytes
SHA-256: 7bf2224a44bddae390d918d54debaead68c73c46196022a14f0711d9fc96c6df

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