Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdeb00f9c50b8410…

MALICIOUS

PDF

66.9 KB Created: 2020-11-10 21:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7fcd07480d4bf8f1e7016b7764b3c333 SHA-1: 24b1ef65008deb61c6fef45a5db31037de16e6e0 SHA-256: bdeb00f9c50b8410fe320eead67c56924671e90d865aad48c4797a1311e6b819
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://gettraff.ru/123?keyword=dodge+engine+interchange+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392472/normal_5fa5d55bb8c40.pdfIn PDF document text
    • https://mebavowu.weebly.com/uploads/1/3/4/3/134353315/ef6491.pdfIn PDF document text
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/zemizawidug-nerox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f8a8cc85b817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f9d78efedfc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f8aee9de143a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_5f9ec5f5a3f30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f8711324bd8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/13844469461.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/dixuwujetosanonojejesalo.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/peetah_bread_house.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/43804531541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c5a2a5-1620-4955-a438-403be4906e10/veredinevejobe.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/jaweboxuxojodunap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef50cf62-e850-47bf-9b81-d7728e05e3d4/52270545466.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_off0000cb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9B 4992 bytes
SHA-256: b319983d5298e38433d5899c450164d827a3e873ced522609744341918041c8c
font_01_sfnt_off0000dc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC92 9932 bytes
SHA-256: c1c4adfd89bc007c2148bee9ec9be97d19c394e56e635f67b00019ca9c5cdfd7

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