Malicious PDF — malware analysis report

Static analysis result for SHA-256 845986931538b50d…

MALICIOUS

PDF

73.4 KB Created: 2020-12-11 02:45:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c6fd04546edb710b4fb7e7b926775386 SHA-1: 78c131b9498473fee32828d1e08e9f23328a949c SHA-256: 845986931538b50d493a46829942fa137f3f3973a34a8886520fc61b70e8f730
214 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics as malicious, including a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The presence of embedded URLs and the ClamAV detection suggest this PDF is designed to lure users to malicious sites, likely for phishing or malware distribution.

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
  • 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.
  • 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://ggtraff.ru/123?utm_term=45%252748%252753+n+12%252713%252703+e In PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_5fd1b611c232a.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/cd3619fef1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385213/normal_5f8f8f0793608.pdfIn PDF document text
    • https://kiroteveve.weebly.com/uploads/1/3/4/3/134378898/rimat-lizosa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484143/normal_5fcaef7f398ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495526/normal_5fb81f3b6424e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf60294e98326c020839b9/1606377514230/y_tu_que_sabes_pelicula_completa_espaol_latino.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdefd87acac6192a857669/1606283230618/94744944179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b89bc22d-2710-4ccf-b970-dcdac9aadd41/elite_torrents_peliculas_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b90b49b1-0981-4b58-9931-74580b98720a/popum.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c759bf71053ccb28a36e/t/5fc512c6145a8629dc519976/1606750920337/vilogozolowogefidesuze.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b0585426f52a30e09280/t/5fd0ce89a040431536c78b5b/1607519881401/device_care_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96591017-b0ea-47ff-b585-3e91d2713903/modele_de_cv_en_arabe.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_off0000e2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BB 4996 bytes
SHA-256: f9837dfab94f51d678aaed1ea85729e7fbf86402d725222a5c696a274d8c0755
font_01_sfnt_off0000f3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E8 10968 bytes
SHA-256: c9ab82891012ea0de00d8a186beac2d19a3f7182c966ba500abd742b710a9c09

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