Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e17ddff602c1eb6…

MALICIOUS

PDF

76.7 KB Created: 2021-04-02 04:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: afc35db50524565997ebac7987266cbe SHA-1: 5ef62919abded3512b032807c09fa03aa0975314 SHA-256: 2e17ddff602c1eb67664938c31611ccb0c64cbc6b87e4ed86a33951ffebcb2ad
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs are used to redirect the user to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/aws?utm_term=the+beatles+hey+jude+piano+sheet+music+pdf PDF link annotation
    • https://bunepefetupudir.weebly.com/uploads/1/3/2/7/132741430/gapumuziwi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447097/normal_5fe16b0d9e5f1.pdfIn PDF document text
    • https://vajawopi.weebly.com/uploads/1/3/4/5/134597817/ferelodexafuboxosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465690/normal_605c4c1c8fe57.pdfIn PDF document text
    • https://zawoxabupuw.weebly.com/uploads/1/3/5/9/135990747/9262d487610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450042/normal_601de70625770.pdfIn PDF document text
    • https://fotaluxig.weebly.com/uploads/1/3/5/9/135973299/xafuriwumowobefuz.pdfIn PDF document text
    • https://pufenenuboz.weebly.com/uploads/1/3/0/7/130738511/2420765.pdfIn PDF document text
    • https://pawuzoratifeze.weebly.com/uploads/1/3/4/4/134471058/5657046.pdfIn PDF document text
    • https://redavifiludog.weebly.com/uploads/1/3/5/3/135348979/6878621.pdfIn PDF document text
    • http://sipujofavotad.iblogger.org/82506639317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_60334cb163bf0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479451/normal_5fe53ad03c886.pdfIn PDF document text
    • https://dosoxikovere.weebly.com/uploads/1/3/0/9/130969917/kunuxinet.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/lumixi/8358922731.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/4liker_app_apk_1._0.pdfIn PDF document text
    • http://kasanuvuwa.epizy.com/basal_metabolic_rate_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/big_little_lies_season_2_episode_5_ending_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/glee_taking_chances_full_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/44056166798.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_off0000eb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0A 5568 bytes
SHA-256: 520db4b88fbba92927d6ed2f337887baafacc0aac1ddcec177077ad57acc7bb6
font_01_sfnt_off0000fde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE1 11080 bytes
SHA-256: d86b765daed6fba82fc1770155465431608f011b7aa98f5299eff96523c16209

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