Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63103ec99895337…

MALICIOUS

PDF

77.0 KB Created: 2021-03-07 12:54:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9d587fa2776cd18e74db860bc3a47e1d SHA-1: 5d363e8bc6e465ea24d7ad634f5eb5502e2b6cc6 SHA-256: d63103ec9989533760027f32079741cd6463c917aab72f0884788c4207afd53b
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://seumenha.ru/wix?keyword=microsoft+surface+pro+4+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487918/normal_6006e3e65e13b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474723/normal_5fec7bacea7b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_6041cac43fa87.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/ap_biology_lab_report_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402501/normal_5fe74e787379a.pdfIn PDF document text
    • https://cdn.sqhk.co/sijaxovada/gZ2BF6d/report_an_injured_bird_in_garden.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477408/normal_60129ae4d5dd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_6039527546ff2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_6041abd10598e.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/0KJoiQl/61628530000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5fd795a5e8f26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_de65e874fbfb4a2d9e8ad3f4632dd316.pdf?index=trueIn PDF document text
    • http://widepidaba.atwebpages.com/plc_programming_course_free.pdfIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_450012ca57e44bdf8d1ba12c4ca460c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/potamotaz/vesibinabatobamejawojet.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/83148731684.pdfIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_d815c0eb605b48f3b10a8f8fc8057a5c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/bubozosuduwelevi.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 7

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_off0000f1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D7 5252 bytes
SHA-256: 96d2d2d458799dc97d9cf01916d2a7deba48b0f748e936fc1c13d7908f0e0f96
font_01_sfnt_off000103b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B3 10216 bytes
SHA-256: 1d8e3c587fc40efeb45aab70c478fd9ef115c4bf84a579dd1acd933a4d543349

Open this report in the interactive analyzer, or submit your own file for analysis.