Malicious PDF — malware analysis report

Static analysis result for SHA-256 f77e1317a5dc446e…

MALICIOUS

PDF

65.6 KB Created: 2020-12-15 01:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 242b5c0b5ba3815ad01e6705887c2e3d SHA-1: bbaae78c66dffcaac8225b76923519586d1f320c SHA-256: f77e1317a5dc446ed32daf9ae762ee237043988a65794e977399ba5254c8663c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a technique often used in link farms to manipulate search engine rankings or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness. The primary malicious URL identified is 'https://traffnew.ru/strik?utm_term=translations+rotations+reflections+worksheet+pdf', which is likely used to redirect users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/strik?utm_term=translations+rotations+reflections+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448100/normal_5fbcb0329e304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447903/normal_5fa2b43168866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447079/normal_5fc05201ef257.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/diledikod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ed3f186-205b-4a39-8261-2f3f0c02c380/student_web_links_es.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/dukanabis.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/55181240621.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/vememutavunamiwut.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/21288825296.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cc6dc14dfd36fef0f123/t/5fc2c3fa145a8629dc0bbc5d/1606599674787/pisanorimubaxavuvetuk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ed5bbcf5f06bcb75bdda/t/5fcc21652fa8bc6bcdd8e66b/1607213415487/13307654560.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A4 5348 bytes
SHA-256: 0fc83d193f3c5a90175c54a52f31419312f6dc0d42ad7c696dc669b3ae2dbb11
font_01_sfnt_off0000d7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 9852 bytes
SHA-256: 0da0d523db6d61aa22d8170c84dd406c7f8853a3589f8ec19937ebcd311c889d

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