Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e54b384a98726e2…

MALICIOUS

PDF

89.8 KB Created: 2021-02-17 09:17:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 080e0f7efe945657a16c53e4ab21fee5 SHA-1: 61e4865140428d79ac9e5be838d0656207a8a60c SHA-256: 0e54b384a98726e2d6df8130f64f086b23ba7c92434e2f15d892ad827af195d9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to obscure the final malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The document body text, though heavily obfuscated, contains references to 'call me by your name full movie online watch', suggesting a lure to a fake streaming service.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/strik?utm_term=call+me+by+your+name+full+movie+online+watch PDF link annotation
    • https://cdn.sqhk.co/vufebevefo/Hiisiiw/new_york_city_must_visit_places.pdfIn PDF document text
    • https://favimorujupufu.weebly.com/uploads/1/3/2/7/132710565/fc468ced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475564/normal_5fd67bea862d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423188/normal_5fe7a071d69b1.pdfIn PDF document text
    • https://votebefi.weebly.com/uploads/1/3/4/7/134715150/b7feb5f.pdfIn PDF document text
    • https://vowexigap.weebly.com/uploads/1/3/1/6/131636774/dobapu-zesivulizo-xumulitolef-rikudum.pdfIn PDF document text
    • https://pudosibax.weebly.com/uploads/1/3/5/9/135964381/814455.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457298/normal_5fe2ce09dadeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377928/normal_5ffb7acd36a4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452372/normal_6013b31a36537.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://galexuduxegi.epizy.com/87730266888.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/nowigubin.pdfIn PDF document text
    • http://xetojilemi.epizy.com/java_properties_file_format.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/tuvunoni.pdfIn PDF document text
    • http://vimiromomekex.epizy.com/fallout_76_tadpole_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/febusesivurim.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11684 5244 bytes
SHA-256: 8f77c70c36856be9c0f4108d6fc2a019b4496562da9fc36eed2944cb9ea1de82
font_01_sfnt_off0001284c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1284C 10348 bytes
SHA-256: d4bf9f2fd5d021b0e63ecb2b797a34f6a05eef697b2f899bd01a45b8f4b33ea1
font_02_sfnt_off00014bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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