Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0c27d08abb6d25…

MALICIOUS

PDF

93.9 KB Created: 2021-03-01 21:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 682bcd1681d423fb51678ac8385b9c75 SHA-1: 6c6b897e077608b5bd309f1aa80c3c809b8a9e59 SHA-256: 2d0c27d08abb6d25e4a85a51321e4ec97aabba9f1f72061afd126ae7bcde6a98
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to disposable domains, suggesting it functions as a link farm. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest it is designed to redirect users to potentially harmful content or phishing sites. The primary attack pattern observed is the use of a PDF document as a lure to drive traffic to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=southern+reach+trilogy+meaning PDF link annotation
    • http://tufuwavaziga.mygamesonline.org/lepijozosi.pdfIn PDF document text
    • https://xuredetinumimo.weebly.com/uploads/1/3/4/6/134630251/raxera_tenefener.pdfIn PDF document text
    • https://zuranuwazob.weebly.com/uploads/1/3/5/3/135332575/kumemekakajewarik.pdfIn PDF document text
    • http://vizuwubifazezix.22web.org/56065027427.pdfIn PDF document text
    • https://wawogikaso.weebly.com/uploads/1/3/4/7/134726687/fe4bd7fa549fc.pdfIn PDF document text
    • https://pinipinemijik.weebly.com/uploads/1/3/0/8/130814728/1959370.pdfIn PDF document text
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/518052.pdfIn PDF document text
    • https://zolotamazuragif.weebly.com/uploads/1/3/2/7/132712333/polixitedomawuv_jamipigesa.pdfIn PDF document text
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/sogusopusi-kefeniputo-nijexutulabiwik.pdfIn PDF document text
    • https://talupujepanuzan.weebly.com/uploads/1/3/4/5/134595677/migiwej.pdfIn PDF document text
    • https://wexarasi.weebly.com/uploads/1/3/4/3/134351888/3118582.pdfIn PDF document text
    • https://fenizivafuno.weebly.com/uploads/1/3/1/3/131380836/1596143.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nozifupatal.epizy.com/the_three_basic_levels_of_long-term_care_are.pdfIn PDF document text
    • http://lekipuvuji.epizy.com/cwms_4._0_upgrade_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001283d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283D 5120 bytes
SHA-256: 0779adccb0621e4a26aea590436a57ed3d0402427098300089efb3c4cdd6ecdb
font_01_sfnt_off00013982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13982 10240 bytes
SHA-256: c6b27a27331ff232cfa1d4b351eba62f542982707b7c2863bac753b59dc88ab1
font_02_sfnt_off00015c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C8B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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