Malicious PDF — malware analysis report

Static analysis result for SHA-256 6026aa6bf21d92ca…

MALICIOUS

PDF

78.5 KB Created: 2021-02-04 22:39:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a22ec70ab62b23f82464a76ee1df22f9 SHA-1: 9d8c9dddce1744ca38626b07154d3542fe851ca1 SHA-256: 6026aa6bf21d92caf3634b7d6fbff50a85cf0146c3c7b5bacf902cd7cf9f240f
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, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate malicious content, likely phishing or a trojan. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards techniques used for distributing malicious content or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=powernomics+by+claud+anderson+pdf PDF link annotation
    • http://jebumivusesujan.iblogger.org/83349522194.pdfIn PDF document text
    • https://vawudida.weebly.com/uploads/1/3/4/8/134890241/kizisapixejol.pdfIn PDF document text
    • http://xasefosixojoloj.iblogger.org/pc_insiders_report.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/vimela.pdfIn PDF document text
    • http://muvajopumo.22web.org/mojugesodukuful.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewivawegimomu.epizy.com/46384164603.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/tipijiwin.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/35409762443.pdfIn PDF document text
    • http://fikupamipevow.rf.gd/gezekumoralifoledalulomij.pdfIn PDF document text
    • http://ketaxesam.epizy.com/d_d_3._5_paladin_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/jejulujekowesimuxutes.pdfIn PDF document text
    • http://rajokawaxes.rf.gd/26214539833.pdfIn PDF document text
    • http://zawagebojirowe.rf.gd/catholic_mass_responses.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/larousse_francais_anglais_5._0._1_apk.pdfIn PDF document text
    • http://zenuvivasefum.epizy.com/5286072464.pdfIn PDF document text
    • http://jopanitovoxa.epizy.com/bevosibuzejij.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_off0000f28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28F 5636 bytes
SHA-256: c9eb69589181d6e32aa8775124ee819803464e5b52e1457a45d450a3a3ed00fc
font_01_sfnt_off000105b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B7 10960 bytes
SHA-256: 15742df2d5801d25578c4963f2b2a9b90c9a59e170edbbb169037163743dc8f5

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