Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3bf154dbf5ba2b5…

MALICIOUS

PDF

78.2 KB Created: 2021-03-07 18:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 190cbc37095cbe2b11756392cc478b46 SHA-1: 5cac7363ab6a43b289dbf07eddaa5279353f7ae3 SHA-256: d3bf154dbf5ba2b56ad3b9c66e7d7a030ad06fab27e1da6c49f3cb4717f69ee6
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary malicious URL, 'https://maypoin.ru/strik?utm_term=hoover+carpet+cleaner+spinscrub+50+manual', is presented in a way that suggests it is a search result for a manual, likely to trick users into clicking it. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

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://maypoin.ru/strik?utm_term=hoover+carpet+cleaner+spinscrub+50+manual PDF link annotation
    • http://madewithsunshine.com/42030969031ocdv5.pdfIn PDF document text
    • http://bio-ita.fun/preppy_handbook_schoolskanrm.pdfIn PDF document text
    • http://deliwubavamir.mypressonline.com/kulusifuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_38190049f8424ff7b1f10968ed7192d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/promissory_note_template_word_canada.pdfIn PDF document text
    • http://vatasinunevuto.epizy.com/microsoft_dreamspark_visual_studio_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/does_the_whale_die_in_free_willy.pdfIn PDF document text
    • http://jemileti.atwebpages.com/fuzesexalef.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/32064325148.pdfIn PDF document text
    • http://livirava.atwebpages.com/play_a_game_of_chicken_meaning.pdfIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_79198464d3f540979002ee2cdd248cec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/848896541.pdfIn PDF document text
    • http://nozixexegaliwe.rf.gd/multiplication_worksheets_printable.pdfIn PDF document text
    • http://puredaw.rf.gd/3839619249.pdfIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_a4637cf9b33744a3ae43b34e7d46a3b4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/contoh_report_text_dan_generic_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/5031550149.pdfIn PDF document text
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_a2cffbaa68644f65b508d00694eb0365.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A7 5388 bytes
SHA-256: f7081b82db8b25f4f73c648a579ddbf23b22430c06dfea1fb04e06d04f1d637b
font_01_sfnt_off0000f9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DD 10388 bytes
SHA-256: 04ceabb55ca06830b4c0a47ea8cf440d7357dac8fcfddd214a746efce1a5a1c7
font_02_sfnt_off00011d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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