Malicious PDF — malware analysis report

Static analysis result for SHA-256 81ff0e9eeab7747e…

MALICIOUS

PDF

70.9 KB Created: 2021-02-24 01:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5dab1de9c7f970a161d5927fb9ffb8c8 SHA-1: 05e200dca5f737cdbec5433309e9a020d9ba1aa0 SHA-256: 81ff0e9eeab7747e10a1d54fcd4bb71b3b9865f65ffe1aaa0e105694318658de
186 Risk Score

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://leonvi.ru/wix?keyword=registax+6+manual PDF link annotation
    • https://nibawomufexax.weebly.com/uploads/1/3/4/3/134371272/susalinosiresin.pdfIn PDF document text
    • https://niromovikusuzu.weebly.com/uploads/1/3/4/6/134651616/43e811108b8f4.pdfIn PDF document text
    • https://zezodejesamibiz.weebly.com/uploads/1/3/1/1/131164097/02228a7.pdfIn PDF document text
    • https://pofifeluvoka.weebly.com/uploads/1/3/0/7/130739131/7819991.pdfIn PDF document text
    • https://fojojaroj.weebly.com/uploads/1/3/1/4/131453509/3504133.pdfIn PDF document text
    • https://ralerafuzirepob.weebly.com/uploads/1/3/4/3/134386916/togilobomet_kizesivugofikun_xoxefipereji.pdfIn PDF document text
    • https://siwufofewexiv.weebly.com/uploads/1/3/5/3/135329456/f9600.pdfIn PDF document text
    • https://garasomebopite.weebly.com/uploads/1/3/0/7/130775476/pomuwibiri.pdfIn PDF document text
    • http://lobuzef.iblogger.org/91622954231.pdfIn PDF document text
    • https://xakivemo.weebly.com/uploads/1/3/0/7/130739368/sepetuteto.pdfIn PDF document text
    • https://novigavaze.weebly.com/uploads/1/3/0/8/130874354/kuwamiv_masakureri.pdfIn PDF document text
    • https://vidufatow.weebly.com/uploads/1/3/1/4/131438098/tavigejixuburetotivo.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/5750574.pdfIn PDF document text
    • https://vibofizetukoz.weebly.com/uploads/1/3/0/9/130969748/kopuv-sigelunij-rirubaz.pdfIn PDF document text
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/vatebinijoluvaxalax.pdfIn PDF document text
    • https://jewupoma.weebly.com/uploads/1/3/1/4/131437657/vekes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD913 5136 bytes
SHA-256: 1536e95f5d609fd66148ace9ac8fa0e60e17d03489d5741e7b55f8ba3dd4bd0c
font_01_sfnt_off0000ea91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA91 10536 bytes
SHA-256: 4c27d2630fe3410ed66d96df3d3780e27e644307d46c2a0032b083fc3de22c2e

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