Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea2b84cd1e3dbb7…

MALICIOUS

PDF

74.0 KB Created: 2021-03-30 01:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8f3796f9909cbcdb4821cd6859f915a2 SHA-1: 5c769f6b9e88153d92ddd894f7f4a82d43729d00 SHA-256: 1ea2b84cd1e3dbb704a69e126df5d9df6c2f600ce34126af12a73e4f11b16820
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for SEO spam or phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://jumiwimov.ru/award?keyword=cognitive+behavioral+therapy+pdf+beck PDF link annotation
    • http://pokupka.space/vizugarimozazakivomokomrpk.pdfIn PDF document text
    • https://wabexerimib.weebly.com/uploads/1/3/0/7/130739061/kizijova.pdfIn PDF document text
    • https://kixivoveluvib.weebly.com/uploads/1/3/0/7/130775150/8760566.pdfIn PDF document text
    • https://pojalurerisufi.weebly.com/uploads/1/3/4/1/134109142/duzepobidejidobube.pdfIn PDF document text
    • http://wekawuro.22web.org/castells_network_society.pdfIn PDF document text
    • http://jobware.pro/my_talking_tom_cat_downloadk1y90.pdfIn PDF document text
    • https://wunebometa.weebly.com/uploads/1/3/5/3/135314425/3a092.pdfIn PDF document text
    • https://jagaruwej.weebly.com/uploads/1/3/0/8/130874180/nudusatevujukol.pdfIn PDF document text
    • http://pelaberofusej.iblogger.org/epidural_anesthesia_in_labor.pdfIn PDF document text
    • https://fugunukotuji.weebly.com/uploads/1/3/4/5/134589730/walirerokazi-nivuz-jagim-bulumaze.pdfIn PDF document text
    • https://xufalawat.weebly.com/uploads/1/3/0/8/130814535/vusome-sewokaxu-jewokilezen.pdfIn PDF document text
    • http://zdsshop.top/52467388374pgipm.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/tokatefozude/paige_spiranac_podcast_tori.pdfIn PDF document text
    • http://vudujufilax.epizy.com/9643128064.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/kegoniketejaze.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/71636662846.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/11501742196.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/98272891200.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/fawagevunevu.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/52538386764.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/gdi_integrated_facility_services_inc._annual_report.pdfIn PDF document text
    • http://guminol.epizy.com/dissertation_acknowledgement_example.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_off0000e34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34E 5512 bytes
SHA-256: cc4b14d9df82a1357c2a830f67da796a32a807ab53798cca64f6c0642a009d70
font_01_sfnt_off0000f613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF613 10672 bytes
SHA-256: f2fa68e9d3ed4b11055ecca3d7ca29e06f8da9657f52be2f25aaa3551d6d4388

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