Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee28e3327640dece…

MALICIOUS

PDF

77.0 KB Created: 2021-03-17 18:38:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: bf77ad6b7e514b30d8f9ed0501098073 SHA-1: a081d5a8c96ada3cf549bdcddeef8d263f518896 SHA-256: ee28e3327640dece45ef7978a807371203c3355c0efbb64cfb7c6732e0622d49
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, with heuristics indicating a link farm pointing to disposable hosting and known malicious redirectors. One critical heuristic specifically flagged a link to a malicious redirector. While no scripts were extracted, the structure and URL distribution strongly suggest a phishing or scam attempt designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=blue+whale+mouth+open In PDF document text
    • https://dubanivexog.weebly.com/uploads/1/3/4/3/134331992/e3259236a0.pdfIn PDF document text
    • https://saduzoxizujakef.weebly.com/uploads/1/3/1/0/131071125/3552314.pdfIn PDF document text
    • https://melezejezoman.weebly.com/uploads/1/3/5/3/135383670/ziweluxu.pdfIn PDF document text
    • https://mimuromujalu.weebly.com/uploads/1/3/0/7/130739347/wilafawazibovam-sopusugawitunab-tubarabeki-javaki.pdfIn PDF document text
    • https://pukogapuwobar.weebly.com/uploads/1/3/4/3/134307851/losijowo.pdfIn PDF document text
    • https://lizulamuti.weebly.com/uploads/1/3/1/6/131607093/fbd0678273.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiwitoremoropup.epizy.com/nespresso_lattissima_touch_4_buttons.pdfIn PDF document text
    • http://turekepopede.rf.gd/55020908707.pdfIn PDF document text
    • http://vigexosav.myartsonline.com/73175590509.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/red_formal_gown_plus_size.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/site_visit_report_format.pdfIn PDF document text
    • http://wibadimitizivi.rf.gd/14236833524.pdfIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_78cf72acfcca4bb69781c20bce413b99.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/mafia_3_underboss_district_guide.pdfIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/34263345516.pdfIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_c765899946de4db4bcec75b758c34017.pdf?index=trueIn PDF document text
    • http://xozadopuwol.rf.gd/short_report_on_road_accident.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_off0000f28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28B 4928 bytes
SHA-256: 288d8e76a3c1914aa1b8a77ba1ca478707e226bf3e0117d696ba262e88630b14
font_01_sfnt_off0001033c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033C 10604 bytes
SHA-256: ce3d9bd30728da057f1a2ecb98f0f3c1be61461091d05706f3d09dd56d52fbe7

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