Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb882202f655cc1f…

MALICIOUS

PDF

82.7 KB Created: 2021-10-09 17:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 111878772159a857c295d150ff7eaa18 SHA-1: 52094ed274a510816e9c3111d1a5a5ba2afec53c SHA-256: fb882202f655cc1f7369771a0d02996bf64b9c19eb778fa2e4380074307ef7b9
134 Risk Score

Malware Insights

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

The sample was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and a large number of external links, many pointing to PDF files on various domains, indicating a likely attempt to redirect users to malicious content or facilitate further infection. The presence of JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://yossy.biz/userfiles/file/917144960.pdf In PDF document text
    • https://marblobathware.com/app/webroot/img/files/kesitafotajas.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/46617351316.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/nomopenutakuwesexodo.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021092106130127.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/99922003562.pdfIn PDF document text
    • http://vpecargo.com/userfiles/file/juluvadobalafikab.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/79732736148.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/15716291295.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/mezekawagopo.pdfIn PDF document text
    • https://m3nan973ru5-pa571.com/contents/files/fotabifateg.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/gimuwexetubugosowof.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/39930237873.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/fexisuzemumuxor.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/15071830315.pdfIn PDF document text
    • https://apelhijau.com/contents/files/69538049338.pdfIn PDF document text
    • http://zuche0551.com/upload/file/53749864479.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/16585012098.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/65801337667.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/zujorenedosakun.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/bupuvogonilewef.pdfIn PDF document text
    • http://markone-tools.com/upload/files/xubunutupuponipobiwitivo.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/59470448142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+end+a+narrative+essayPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE011 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF823 17448 bytes
SHA-256: aaebc67be2d8e1ca470cdb26a588d3b334d972a5b8006340c7ed744a16e74fd9
font_02_sfnt_off00012536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12536 10452 bytes
SHA-256: ba2c0fa1cf2251831d85fd24945c183c584ce138461b7139e4ad31fb784fa2fd

Open this report in the interactive analyzer, or submit your own file for analysis.