Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc6d8bf263249ab…

MALICIOUS

PDF

69.6 KB Created: 2021-02-15 10:39:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4c2a350063f2d4ab6b811112835c308d SHA-1: 28de86abd5a93f1733e83a47d6515b3da9d6909f SHA-256: 2cc6d8bf263249ab6d18748de969b7b34217c854a1345dde1678deb7251ea03b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to distribute malware or phish for information. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful 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 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.
  • 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://seumenha.ru/123?utm_term=what+are+the+fitness+requirements+for+correctional+officer PDF link annotation
    • http://ndfnasg.xyz/8615654207897upy.pdfIn PDF document text
    • http://politach.com/earthquake_worksheets_for_middle_school3uauf.pdfIn PDF document text
    • http://boost-shop.xyz/778800050264nif4.pdfIn PDF document text
    • https://ferijadupegol.weebly.com/uploads/1/3/4/7/134705138/kakemosiwebamaw-sinukagugebat-binakaguvusig.pdfIn PDF document text
    • https://pitazifuriza.weebly.com/uploads/1/3/0/9/130969431/filopomuzoten.pdfIn PDF document text
    • https://gopogaxewose.weebly.com/uploads/1/3/4/0/134013169/4356783.pdfIn PDF document text
    • http://umkatrade.ru/gateway_b2_workbook_2nd_edition_answersmquy5.pdfIn PDF document text
    • https://gawozigojuvapa.weebly.com/uploads/1/3/4/8/134896601/32ff4f.pdfIn PDF document text
    • https://xesapexoxes.weebly.com/uploads/1/3/4/6/134633169/26d922c59ea778.pdfIn PDF document text
    • https://wezusewowanura.weebly.com/uploads/1/3/4/2/134235680/034e8.pdfIn PDF document text
    • https://wosuletoxo.weebly.com/uploads/1/3/0/7/130739711/3a8979bb3c09e15.pdfIn PDF document text
    • http://tiktokfrance.fun/19286624631hv532.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/fotepopunaj/12665196093.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/selizikuwinotib.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/practical_english_phonetics_and_phonology.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/laurentide_ice_sheet_map.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/96846976416.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_off0000d47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47C 5260 bytes
SHA-256: 7a90a3ce1fd30dbaf267eca825561c976c3c554679109795108bfbda2a6cdf2c
font_01_sfnt_off0000e648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 9972 bytes
SHA-256: d3445639dbd380452411f141a6f0b18f4e780c1fb1110720d905b77908d5db2c

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