Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee9ec2bf911a226…

MALICIOUS

PDF

73.9 KB Created: 2021-02-28 02:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: aeb7fd9fe9947aae84ef21a726ccf19c SHA-1: 100c1eec24211f78063a6cbe5d3f69cafc32f1c8 SHA-256: 0ee9ec2bf911a22633cd7edb56ae46281eb00cc3671581181420e1d8744cab7b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to domains that appear to be part of a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/123?utm_term=para+que+sirve+la+moringa+te PDF link annotation
    • http://piriketag.22web.org/57436231666.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449181/normal_5fe347fbf223f.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/tamowemuvapu_lipot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380881/normal_600037caf1790.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393179/normal_6001862a83b41.pdfIn PDF document text
    • https://zunejafeg.weebly.com/uploads/1/3/4/3/134382709/1803905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_5fdad30d1ae21.pdfIn PDF document text
    • http://mujezinej.22web.org/zewef.pdfIn PDF document text
    • https://vafopizinenited.weebly.com/uploads/1/3/4/4/134480139/9147443.pdfIn PDF document text
    • https://jadegivi.weebly.com/uploads/1/3/4/8/134851053/69ed54a32103f79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497075/normal_5fcd96290d0a1.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/xukirizugukugi/vijoxuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/spectrum_cable_tv_guide_columbus_ohio.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/pudetadenobuledafoma.pdfIn PDF document text
    • http://gelutosedufom.epizy.com/coroplast_sheet_cutter.pdfIn PDF document text
    • http://kesotufujurox.rf.gd/78606066283.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/gimarumibuboresopi.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/article_about_health.pdfIn PDF document text
    • http://dawiwafawuz.epizy.com/90203842626.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_off0000e217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE217 5192 bytes
SHA-256: 701218e0a3239ec814fb75505becfc273d5ed6700fe4e4f4d2463d8c634e0c42
font_01_sfnt_off0000f3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B3 11492 bytes
SHA-256: a3855f4e557609fa20215f2534a77fff26e7b065afd4dc79ee591b52583558ff

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