Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a92730646f6217a…

MALICIOUS

PDF

74.5 KB Created: 2020-11-20 08:01:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1ef0b757dd86a555be26871266cfdae9 SHA-1: 193a0dede9fda3ee4ca10323a05ae4c441a0aaf1 SHA-256: 3a92730646f6217a5996880999f25f18fd8557e9d29c43246e34a14abaaf551f
214 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. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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/aws?utm_term=plant+cell+organelles+and+structures+answer+key In PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/54f421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444371/normal_5fa6dccd12842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413007/normal_5fae862ea0356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f87607d35819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458614/normal_5fb72d3c3a58b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420911/normal_5f99c0aa7930e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384817/normal_5f99f3121fd18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414357/normal_5f9c56092576d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380209/normal_5faffdcceeecd.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/d5727076-a105-488b-bb7b-f66d25ef39bc/44849750576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b64c6b-2ebe-4a1f-8b45-dfaeb342519c/guderoxuxit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a791fb3f-7845-4d28-8d77-60eef723e6cd/1238611637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2496aa7-3aee-4d0a-82a9-d8be7eba83a7/50731801856.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 6

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_off0000e77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77B 5368 bytes
SHA-256: 1420def7eab7a44b84b307a2caa2c630d95f8562b9811206247ba58a29b6bc47
font_01_sfnt_off0000f9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E2 10292 bytes
SHA-256: 5126d0473985dab4a89df584fe7712f32bcdf8745d80aa20e0d00ae365b8ec03

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