Malicious PDF — malware analysis report

Static analysis result for SHA-256 919f0db1eda04569…

MALICIOUS

PDF

77.6 KB Created: 2021-03-03 09:16:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: acbceae90a6b5e96ceea22313a945872 SHA-1: d977d6d3623470855e0dab2bfcd8acee3086ce5e SHA-256: 919f0db1eda045696df7d3f10f876a6141abe399c68c42fae84b54f4fa49619c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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/123?utm_term=madden+nfl+16+ps4+review PDF link annotation
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/fabikowane.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/xenegisisigogupoxuvecznip.pdfIn PDF document text
    • https://senidexug.weebly.com/uploads/1/3/0/7/130775540/49421665df220.pdfIn PDF document text
    • http://mamajan.space/dagitutajakatutd1n7s.pdfIn PDF document text
    • http://cardioactiveitalia.site/murray_lawn_mower_oil_drain_plug_locationog00b.pdfIn PDF document text
    • http://xalufabo.iblogger.org/what_is_computer_network_class_9.pdfIn PDF document text
    • http://esmoney.site/podadinu367ud.pdfIn PDF document text
    • https://fugogifozu.weebly.com/uploads/1/3/4/8/134888696/9081500.pdfIn PDF document text
    • http://logmeinnow.xyz/keromd64bl.pdfIn PDF document text
    • http://helpcenter.business/47098292914aler.pdfIn PDF document text
    • http://netewe9.xyz/adding_and_subtracting_integers_word_problems_worksheetswregm.pdfIn PDF document text
    • http://4gusevshop.space/ratalusowomazisetirisj2w1k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonowodiguvab.epizy.com/sodizaxugapopekana.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/pie_calcaneo_valgo.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/satupideb.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/chrome_for_android_tv_box.pdfIn PDF document text
    • http://lunokaruridonal.rf.gd/5532095407.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/kindle_audio_reader_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/fyuse_3d_photos_app.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/xikonujoxisiwir.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/human_anatomy_charts_free.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_off0000f40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40D 5488 bytes
SHA-256: 856d179c2aeaf8626483f069e70dc1a70345cf015e7e3c08984221502fa61464
font_01_sfnt_off000106ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EC 10032 bytes
SHA-256: df9feb3457a71353bdd8011352af5b4c78c822cf211e55889855f8083912dda4

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