Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa408628ddbefdd7…

MALICIOUS

PDF

82.2 KB Created: 2021-03-15 01:02:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2bafc497aa7b5ff8e8e871a87a5f3c7a SHA-1: 74dc7ce0a34520997f3375f1600c6b70d0e571fa SHA-256: fa408628ddbefdd78b8eea979c25d237d991bb227482d3f0e12668406c2f5825
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to contain a title related to cleaning a Dyson vacuum, which is likely a lure to direct users to malicious URLs such as 'https://pelibifir.ru/strik?utm_term=how+to+clean+a+dyson+dc25+animal+canister'. No scripts were extracted from this sample.

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://pelibifir.ru/strik?utm_term=how+to+clean+a+dyson+dc25+animal+canister PDF link annotation
    • https://voxuvuru.weebly.com/uploads/1/3/5/3/135390020/be0cf999.pdfIn PDF document text
    • https://xesisawizes.weebly.com/uploads/1/3/1/6/131606125/5514147.pdfIn PDF document text
    • http://atelier-spb.com/psychology_quizlet_chapter_3cjv8x.pdfIn PDF document text
    • https://mitumeme.weebly.com/uploads/1/3/4/8/134879381/3983304.pdfIn PDF document text
    • https://wugepazi.weebly.com/uploads/1/3/4/3/134348030/fagaxegokililamosiji.pdfIn PDF document text
    • https://wonaxegem.weebly.com/uploads/1/3/6/0/136049801/1123503.pdfIn PDF document text
    • https://luzuredero.weebly.com/uploads/1/3/4/0/134016924/besujijomume_xotaj_jujapetojuzaku.pdfIn PDF document text
    • http://gravkamen.ru/68808132100ww9pa.pdfIn PDF document text
    • https://naxovemunozi.weebly.com/uploads/1/3/5/9/135958864/depoxebezu.pdfIn PDF document text
    • https://fufopijubotuxo.weebly.com/uploads/1/3/1/3/131381544/4897049.pdfIn PDF document text
    • https://romuxejis.weebly.com/uploads/1/3/4/8/134887308/466754.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/dojivewobasuval/white_platform_sandals_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/19118110533.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_77673c52cc7f4a3abc2a6618bcbe5d62.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/convert_base64_to_angular.pdfIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_28a7108dfa5746518c8753c7dda558ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/league_of_legends_support_guide_season_9.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/what_is_candlestick_chart_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/how_old_are_the_shining_twins_now.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/nebuwitewabafumobex.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_off00010409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10409 5496 bytes
SHA-256: 0dd833e1db477ca5789d08461eac61198f4f0f28e5b203995a6b4af4d722f47d
font_01_sfnt_off000116c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C0 10564 bytes
SHA-256: bcbd7a758fcaff3f2cc9e09e11a6b5797d304851c8739d58ffbdaf8283d63425

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