Malicious PDF — malware analysis report

Static analysis result for SHA-256 250e164260bbdbe0…

MALICIOUS

PDF

66.3 KB Created: 2021-02-19 14:01:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5d9f017f52d4612ea69c56f5220c3cf3 SHA-1: c1cb44f95c0e9e8a9dd8da2f6aaba2a50a932cd0 SHA-256: 250e164260bbdbe06691335dbc272000e533d560a6ecc71cc02b14fa0b73de2b
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 pointing to potentially malicious domains, suggesting a link farm or phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious. The document body, though heavily obfuscated, contains metadata related to 'Lds the eternal family manual' and 'wkhtmltopdf', indicating it's likely a lure document designed to drive traffic to these external 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://jacksth.ru/123?utm_term=lds+the+eternal+family+manual PDF link annotation
    • https://sexitikimuzulab.weebly.com/uploads/1/3/5/2/135296232/4964378.pdfIn PDF document text
    • https://kisuwirabavaruz.weebly.com/uploads/1/3/3/9/133999170/jorokisidujit.pdfIn PDF document text
    • https://wegenagozej.weebly.com/uploads/1/3/5/3/135394478/vedokosoju.pdfIn PDF document text
    • http://mugamotapaso.22web.org/dibubij.pdfIn PDF document text
    • https://pifavakibapel.weebly.com/uploads/1/3/0/8/130814246/rirapo-xuzobi-zuwupa.pdfIn PDF document text
    • https://kepedeko.weebly.com/uploads/1/3/5/9/135959580/7215320.pdfIn PDF document text
    • https://tuzakalo.weebly.com/uploads/1/3/4/4/134492431/51c39fcac02fd24.pdfIn PDF document text
    • https://xolivura.weebly.com/uploads/1/3/5/9/135958321/zamolu.pdfIn PDF document text
    • https://bifimazetaxa.weebly.com/uploads/1/3/5/3/135326975/solinuzuwusa_lanuw_ralobo_dozid.pdfIn PDF document text
    • https://gojafone.weebly.com/uploads/1/3/4/8/134891791/rifofonigowoke.pdfIn PDF document text
    • https://fadoxidibeja.weebly.com/uploads/1/3/2/6/132695582/zejenosad.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/pasawe/graphic_design_bangla_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/xozokesonugigat.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/biografia_de_pitgoras.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/puzokodomupos.pdfIn PDF document text
    • http://fizifar.epizy.com/55086296864.pdfIn PDF document text
    • http://futuwerelak.epizy.com/cheat_engine_mac.pdfIn PDF document text
    • http://dadixuxizu.rf.gd/30194823722.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/lifijapepuso.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_off0000c7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7EC 5188 bytes
SHA-256: e00b9abf25ff1bd9c33612e846becfcd2c1b50d238c577f7d5c366f0f5f4c3db
font_01_sfnt_off0000d975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD975 10156 bytes
SHA-256: 5f219df4c0b5c8c24d312a27d12dcbb1c1a480724e4523f7ba51b6830bae1fd7

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