Malicious PDF — malware analysis report

Static analysis result for SHA-256 99990d03845044e5…

MALICIOUS

PDF

66.0 KB Created: 2021-01-13 01:33:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 16fe64439c853dcf8fcf1bcb1b4bf5be SHA-1: 0c22bbb43d7016bc60ec6f450584641bb620fc75 SHA-256: 99990d03845044e5fe52e0e31df7b1477fce3402fbf5e01280238ddec7323790
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://trafffe.ru/aws?utm_term=parallel+lines+and+transversals+packet+answer+key PDF link annotation
    • https://site-1177942.mozfiles.com/files/1177942/69877788971.pdfIn PDF document text
    • https://site-1177098.mozfiles.com/files/1177098/gosakupenuxel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391621/normal_5fa0b961d2da1.pdfIn PDF document text
    • https://site-1242381.mozfiles.com/files/1242381/crescent_lake_fishing_report_florida.pdfIn PDF document text
    • https://site-1168078.mozfiles.com/files/1168078/the_bucket_list_book.pdfIn PDF document text
    • https://wiperuzikenod.weebly.com/uploads/1/3/4/6/134694852/a008a055644afda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484623/normal_5fcaf8a6dad74.pdfIn PDF document text
    • https://site-1173426.mozfiles.com/files/1173426/36509423646.pdfIn PDF document text
    • https://site-1177706.mozfiles.com/files/1177706/hitman_2016_strategy_guide.pdfIn PDF document text
    • https://site-1185524.mozfiles.com/files/1185524/lagu_bts_bogoshipda_matikiri.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/zerepuzuze/four_letter_words_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/fujitsu_fi-_7160_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/ballarat_tv_guide_tonight.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/clarivate_analytics_journal_citation_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/47179668303.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/14425879604.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/fazenatexojerogogux.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_off0000c60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60F 5384 bytes
SHA-256: 5c1293bec3c72d852586da3441843a736a6721bdccacb1d542301bea6d063133
font_01_sfnt_off0000d889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD889 9960 bytes
SHA-256: 27eed3598f32db9b55c87f63f04fa76500c8e282ab6f1f04a8acbe1912ec12cb

Open this report in the interactive analyzer, or submit your own file for analysis.