Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5569a769685697…

MALICIOUS

PDF

66.5 KB Created: 2021-02-09 02:00:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: eaf5e16ed9510bd037902eb58347d168 SHA-1: b6d22d6a521d041e711210174cbdad8d31763c0e SHA-256: 8f5569a769685697d3757224c9b6d6b29125c31dfcbaf583cbf74741e45c0d59
96 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'maypoin.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and mentions 'The business school book pdf', indicating a lure. No scripts were extracted, but the presence of external URLs and the ML detection strongly suggest malicious intent, likely related to phishing or delivering a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=the+business+school+book+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417140/normal_5fcac808a015a.pdfIn PDF document text
    • http://erogan-encolumbia.site/49781646716f4e2h.pdfIn PDF document text
    • http://betmoy57.com/95985448037zp7ra.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449001/normal_5ff6c98cacbbb.pdfIn PDF document text
    • http://kyponnik.online/don_juan_canto_118cof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421943/normal_6007a483095a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485152/normal_5fc5d298cd43e.pdfIn PDF document text
    • http://springtea.space/begozekajolem6pe7m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367920/normal_5fe128c962f75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476288/normal_5ff1569192f75.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/zalaripelat.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/gekixadonuru/tratamiento_nutricional_alzheimer.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/the_difference_between_broadsheet_and_tabloid_newspapers.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/bouvier_s_law_dictionary_2nd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/19564481138.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/austrian_airlines_property_irregularity_report.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_off0000c6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DC 5088 bytes
SHA-256: e6b09f78cd38ddab27c64a2ac7292b843b1ff57299d239c00e0f4ba68e6d6099
font_01_sfnt_off0000d82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82A 10808 bytes
SHA-256: 326cb13c1ca2a2131ba23c21f094660b570f37789428c16c5187f7648b601231

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