Malicious PDF — malware analysis report

Static analysis result for SHA-256 055a0caa70252eac…

MALICIOUS

PDF

67.7 KB Created: 2021-02-24 05:51:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2de9fca40d943e724f89028f209abddb SHA-1: 527b82fdf229a4e242a17afbc84efa6fac85cbcc SHA-256: 055a0caa70252eacd07285d2f83f56e6e6f01082d9f508ee308fd525fcd45b57
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'leonvi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to '10 top scientific facts in the bible', a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/aws?utm_term=10+top+scientific+facts+in+the+bible PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374359/normal_5ffd4d08f384a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_5fe68d77763fd.pdfIn PDF document text
    • http://sfr-webmail.com/block_panchayat_secretary_2018_question_paperkjds3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464878/normal_60189ff396529.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/where_is_the_volume_button_on_panasonic_tvq8b7h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_6010f79ad35d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_602f62fb3648c.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/32gfhir/66633460713.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495413/normal_6000c551446f2.pdfIn PDF document text
    • http://vinorama.fun/attestazione_di_conformit_catastale986v6.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwuzasemifo/hcxehjg/my_lips_are_tingling_what_does_that_mean.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/g0toKUT/48058837264.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/NPie4rH/neutralizer_for_hair_color.pdfIn PDF document text
    • http://taxuluponizel.iblogger.org/8601672160.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424024/normal_5ffcf066ccec6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_5fe7c03ca6978.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489733/normal_6026ace05fe92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489428/normal_5fee6dba98f29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cd02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD02 5244 bytes
SHA-256: 583c150059a674f7b888f85c71090d84a754e69e2946b4252fac1bbf8b7bed31
font_01_sfnt_off0000ded8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED8 10300 bytes
SHA-256: f251e1282dd57fc65679ebcdec421ec554ab86a027d92d9b96c242608e3372da

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