Malicious PDF — malware analysis report

Static analysis result for SHA-256 32fe13995a0dddba…

MALICIOUS

PDF

92.7 KB Created: 2021-03-17 21:24:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 97abbffb05e0f74d8d07e20e53beacfd SHA-1: 1c236fd522c81a4f079aa1b770bd133a8d06eeef SHA-256: 32fe13995a0dddbaabe7121cde3eb9d0a342eb4d74ab44e85b51bdb83069d7cc
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://kuzutuzo.ru/award?keyword=species+aggregate+pdf', suggests a phishing or malicious content distribution scheme. ClamAV also detected this file as 'Pdf.Phishing.Trojan', further supporting its malicious nature. No scripts were extracted, but the structure and URLs indicate a phishing or malicious content delivery attempt.

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://kuzutuzo.ru/award?keyword=species+aggregate+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4478687/normal_6002fc4aec74f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_602903b649bf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419195/normal_5fef82f89cd4a.pdfIn PDF document text
    • https://naluzakagowu.weebly.com/uploads/1/3/1/4/131411806/depudo.pdfIn PDF document text
    • http://freud.icu/hideo_kojima_game_death_strandingnfs9y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421200/normal_604d94ba451f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465539/normal_5fd389f9172a9.pdfIn PDF document text
    • http://mobile-media.moscow/sepufigadotopusuvimubufkzrdf.pdfIn PDF document text
    • http://fishland.store/duralast_bp-dl750_manualyr72t.pdfIn PDF document text
    • https://zazobowelukoki.weebly.com/uploads/1/3/0/9/130969428/lobojob.pdfIn PDF document text
    • http://vvinorama.fun/scientific_workplace_macwrmr7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373768/normal_5fca245827d48.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/lupuvogotog/gokuvezotiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/21872658183.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/baluvexewavojoru.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/dartmouth_massachusetts_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/english_language_arts_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/ayushmann_khurrana_all_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/69562292960.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/chitika_meda_chitika_vesara_naa_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/us_visa_renewal_application_form_in_nigeria.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_off00012c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C51 5396 bytes
SHA-256: af2bbe841c2231b123ca8d7f4168b749f221c54b7507f495333e4655097aa2a0
font_01_sfnt_off00013eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB8 12136 bytes
SHA-256: abdf46cd18b95835c9aef7a72b50db8f956e6d19fe0aae8b4863563f770475a0

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