Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbd6bf806da7134…

MALICIOUS

PDF

74.8 KB Created: 2021-03-01 18:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: e893ff847ca3145dc23c6cf471dd5f26 SHA-1: 1f69a6cdd45b246b4dec9e99d4b27d780d577784 SHA-256: 0dbd6bf806da7134d36df9c69a08d06fb85450a6aa89cb7b73397dcad92724cc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'mezovuduw.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, likely for SEO manipulation or to host malicious content. ClamAV also flagged this as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the presence of many external links implies an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/wix?keyword=diesel+mechanic+n2+study+guide PDF link annotation
    • https://lewagezu.weebly.com/uploads/1/3/4/3/134369469/pobubobemapi-joxum-kedimomapo.pdfIn PDF document text
    • https://nimugafibe.weebly.com/uploads/1/3/6/0/136084612/5626018.pdfIn PDF document text
    • http://vozaxakinexu.iblogger.org/movies_counter_marathi.pdfIn PDF document text
    • https://sukuwakutas.weebly.com/uploads/1/3/4/6/134603616/9973993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5fda26c74b3aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495536/normal_6014ba7e3b3d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_6013a2c5bd44d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367290/normal_5fe45ea2d74f8.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/how_to_improve_emotional_regulation_child.pdfIn PDF document text
    • http://mirror-x.org/juzobaxubezii3w1q.pdfIn PDF document text
    • http://yazansoft.com/43450185271z0idf.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/davawina/cinderella_broadway_dress_transformation_gif.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/accu_chek_aviva_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/63986856634.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/febumetizuruxosujubadusew.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/19698626911.pdfIn PDF document text
    • http://tekuxumavipu.epizy.com/crater_lake_map.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/wii_error_message_50299.pdfIn PDF document text
    • http://gapedazawa.rf.gd/free_printable_donation_receipt_template.pdfIn PDF document text
    • http://rolugume.rf.gd/cannot_set_up_icloud_email_on_android.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_off0000e85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85C 5492 bytes
SHA-256: b6bb8eb5921ddae3f9c93343f496356921fd547a42bdbe46c71ea2f500519050
font_01_sfnt_off0000faf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF5 10304 bytes
SHA-256: 2fd5bdd8c0fe579ab8abea6d72dcbe480f9398f7b70135c70bda564045045779

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