Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ea8580e14730a5…

MALICIOUS

PDF

90.6 KB Created: 2021-03-20 22:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 600815692ca56aa056c236f416b3c1f3 SHA-1: 479abca10473938f0a56f07fcd454947b140f4e0 SHA-256: d2ea8580e14730a5549fef19b3e6f28f4cde00413b5c17bceb65bdbf2fba7907
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for initial access via spearphishing.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=what+is+newton%2527s+3+laws+of+motion In PDF document text
    • https://tedozumezefa.weebly.com/uploads/1/3/2/7/132740670/a7a0fdc27.pdfIn PDF document text
    • https://cdn.sqhk.co/xugiwatokax/jeDGlhc/bhavan_vidyalaya_chandigarh_uniform.pdfIn PDF document text
    • https://fekanarikivokil.weebly.com/uploads/1/3/4/8/134884633/gupuputokakuvaza.pdfIn PDF document text
    • http://urott-hu.com/54168158068w2h7o.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/2vsiglj/shell_reload_profile.pdfIn PDF document text
    • https://lurugidapu.weebly.com/uploads/1/3/4/3/134315770/xerawerinumod.pdfIn PDF document text
    • http://ygrash.website/can_you_cite_a_person_in_apalm805.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/Bpngg9I/the_great_courses_1_month_free.pdfIn PDF document text
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/248623f84bb64.pdfIn PDF document text
    • https://vexitibivomak.weebly.com/uploads/1/3/0/9/130969710/zodumumebet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dizutobasuxolom.epizy.com/kesolavajupu.pdfIn PDF document text
    • http://roxugotosaka.epizy.com/wavegenivabugasi.pdfIn PDF document text
    • http://nivajunupoz.epizy.com/guidelines_treatment_pneumonia_elderly.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/66830142527.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/xesivuxiw.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/mepefo.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/bupuwano.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/gugovetuwigu.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/pompeii_bastille_sheet_music_piano.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0D 5212 bytes
SHA-256: aee10d3464b2eced6f62f8f7a52b16fa715450f1d3d1217af429ff7f4c14afd0
font_01_sfnt_off00011fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC3 11740 bytes
SHA-256: a23d469f44d0c1ce1ce22efe3fafa86b4e2cd1a33a84480cdcc477e811212724
font_02_sfnt_off000147af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147AF 16128 bytes
SHA-256: c6d15a48544a3bb55b86c8e7bdd0e7cb70a7a2427dd0dd016b970b4b8641d415

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