Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32357946644fdb0…

MALICIOUS

PDF

63.7 KB Created: 2020-12-24 07:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e2bf4af9bf654bad7f38f2e406e7c688 SHA-1: 6b4a8322a74024395c4814eec1c2226e7cd2118f SHA-256: e32357946644fdb0c36956e734aba696d9f5a804718cea27972b00ea43af82e4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-farmed and point to potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The ClamAV detection further confirms its malicious nature. The document body, though heavily obfuscated, suggests a lure related to movie downloads, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=bambukat+full+movie+720p+free PDF link annotation
    • https://cdn.sqhk.co/nalogigoke/hgifMrb/rock_music_online_radio_station.pdfIn PDF document text
    • https://lujadogube.weebly.com/uploads/1/3/4/5/134522393/digunodizekexe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5fd26c94e41a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484807/normal_5fd9d79fb2ae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5fa5665a907d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5fa8662437cae.pdfIn PDF document text
    • https://jenititufevi.weebly.com/uploads/1/3/4/5/134595561/9626463.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/rekorewexidiwo/ap_systems_qs1_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/thimiru_pudichavan_movie_free_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/esl_body_parts_worksheet_for_adults.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_off0000baf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF8 5536 bytes
SHA-256: de9881003dd18d6f5347e86a743ecf8cca164bba27a12cea2310e38e37a4dff2
font_01_sfnt_off0000cdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCB 10680 bytes
SHA-256: 533fd5b249aedb9866c813aba22a3edd21ac3079dd2e74723ea1a7fc4a6bf3ac

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