Malicious PDF — malware analysis report

Static analysis result for SHA-256 4979bdbd8b769193…

MALICIOUS

PDF

70.5 KB Created: 2020-11-24 20:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 44e093f1d4093c584d62ff09dd4725b9 SHA-1: 62d985c20ed17283afd891e756d78eb9d49c2150 SHA-256: 4979bdbd8b769193ebdf7427b101457499e273d0310140de914b3831dd74b4a3
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 0.9997

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://traffmen.ru/123?utm_term=indirect+character+traits+worksheet+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5fbc8378e8a26.pdfIn PDF document text
    • https://lonopowixeza.weebly.com/uploads/1/3/4/6/134620564/watodilakome.pdfIn PDF document text
    • https://xubupibef.weebly.com/uploads/1/3/4/7/134742940/e61272243.pdfIn PDF document text
    • https://derigibi.weebly.com/uploads/1/3/4/4/134447264/xajovuxad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428341/normal_5faee28f61cbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421036/normal_5faa82f7b4547.pdfIn PDF document text
    • https://gojolukok.weebly.com/uploads/1/3/4/4/134455450/3338615.pdfIn PDF document text
    • https://noxurujoba.weebly.com/uploads/1/3/4/3/134384046/piwuxirekafegu-sijufuziremur-bebopazorufew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_5fa35a2a6ccf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376875/normal_5f9727fd58d97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/widesesarubome.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB14 4976 bytes
SHA-256: c6cfba6c9d368de0fd97bba6f334203dfc36c60971af9bf898e2247f1551d32f
font_01_sfnt_off0000dbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF7 10300 bytes
SHA-256: e379ee3b7ac7beb3d16d1c397497e0351b0a4c3e5e261eb3c4501de50288015b
font_02_sfnt_off0000ff04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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