Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a60a9f672d07a9…

MALICIOUS

PDF

62.7 KB Created: 2020-11-14 10:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4e0521094f0cdd8bbe84ad17d1254937 SHA-1: dfed2960fb282c47911a3c04c97935b720ac13dd SHA-256: b6a60a9f672d07a934adce5e22121635c15ef0ebc5e2ef70fa4d6ab0341b1bd8
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 0.9998

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://traffking.ru/strik?utm_term=fs+13+t%25C3%25BCrk%25C3%25A7e+yama PDF link annotation
    • https://tejebufu.weebly.com/uploads/1/3/4/3/134353082/7060185.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/mezevoxinokimuwamibu.pdfIn PDF document text
    • https://mogazikazalag.weebly.com/uploads/1/3/4/4/134440800/xuvokukuxiruviv.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/sodim-dajozigesozix-sojesumupusimow.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/2ca4dcb14d4f0ff.pdfIn PDF document text
    • https://lusukukupesakub.weebly.com/uploads/1/3/0/8/130815137/dejik_pixerigo_wuvotaje_xukujo.pdfIn PDF document text
    • https://kinefevemupopit.weebly.com/uploads/1/3/4/6/134631160/9816534.pdfIn PDF document text
    • https://mexugagerow.weebly.com/uploads/1/3/4/4/134482965/sajujuboramodu-texoboxefudu-fanudepaxorada-rakosuzuzetuje.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/vitelitubovuluj/17399996076.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/gowaw.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/systematic_observations_definition_science.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/corporate_governance_guidelines_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/fomasobegaruxotujejufub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c6035c0-4edc-4ab7-9848-818a665bf3ff/vowopudifosikopotepo.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/biological_classification_pogil_answers_key.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_off0000b6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A9 5440 bytes
SHA-256: fedf048d7e5fab9b29b17bd136b28d2a96fa45611923fd2818b95590373298ae
font_01_sfnt_off0000c8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F1 11504 bytes
SHA-256: d7e4754d20cfc5e8e3044e084a0c6ccb2b4d2779c48ce651bd6ba685484c3e8f

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