Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6a31bc4d46555a…

MALICIOUS

PDF

77.3 KB Created: 2021-05-07 12:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bb0980dbe6441393da4a5d0bf5ae3d16 SHA-1: de441859a85de70a644068655e19c9305c589cd6 SHA-256: 0d6a31bc4d46555a2e7506ed554156aefad1f808bf1dbad3f15813831feab51f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://zajinet.ru/strik?utm_term=ernest+hemingway+short+stories+collection PDF link annotation
    • http://kifojex.22web.org/converter_em_jpg_ilove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497131/normal_60407c6224aed.pdfIn PDF document text
    • http://rotixumuzu.22web.org/all_information_about_upsc_exam.pdfIn PDF document text
    • https://bunogijadijis.weebly.com/uploads/1/3/4/8/134896562/ruziko.pdfIn PDF document text
    • http://jafujofefi.iblogger.org/72725091474.pdfIn PDF document text
    • http://memaviwebepa.22web.org/65212319284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_605bf2bdc17c6.pdfIn PDF document text
    • http://ruvetimoroneb.iblogger.org/5317960077.pdfIn PDF document text
    • https://wigitofeza.weebly.com/uploads/1/3/2/6/132682623/razepirez_lenigetarebi_rigivo_namanede.pdfIn PDF document text
    • https://giweberemep.weebly.com/uploads/1/3/2/6/132682555/repazix.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://s3.amazonaws.com/lodazojamuva/42277753648.pdfIn PDF document text
    • http://motinekan.epizy.com/86468659176.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/powerpoint_poster_template_48x36.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/35387810678.pdfIn PDF document text
    • http://fanapokabu.rf.gd/the_stranger_albert_camus_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/yousport_reporter_app.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/belonopikolozol.pdfIn PDF document text
    • http://maxefaronuxugur.epizy.com/94663476537.pdfIn PDF document text
    • http://wezikadedikenev.epizy.com/acls_advanced_cardiac_life_support.pdfIn PDF document text
    • http://filunasuxelitux.epizy.com/assessment_in_mathematics_education.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE564 5152 bytes
SHA-256: 606e88a80fac3f62d17dcbb6a3a730963ab443290b1f760a905a235aa1920920
font_01_sfnt_off0000f6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C5 10212 bytes
SHA-256: cb9389706cb6becb00b749ab1c0c02b2540c03d61dc01e9d06017cfc21ea72d2
font_02_sfnt_off000119e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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