Malicious PDF — malware analysis report

Static analysis result for SHA-256 26de070beed9c34d…

MALICIOUS

PDF

72.4 KB Created: 2020-11-11 11:55:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dd80240bed8cd3c54cb0c05dc277c113 SHA-1: 960f8a588a10f5eb147fba62d8bcdefed4f8beca SHA-256: 26de070beed9c34d7c6b3824333709c42dc48c9ccfe4a95ba361d76c676b90f5
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://ggtraff.ru/123?keyword=fundamentals+of+engineering+economics+pdf In PDF document text
    • https://varavedonenen.weebly.com/uploads/1/3/4/3/134316352/8303426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f97385337d79.pdfIn PDF document text
    • https://wizisenax.weebly.com/uploads/1/3/4/3/134320615/wisivanawomozi-gowasebolodadu-zefomiseno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f9c4811e1610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f8ae6672f4bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_5f90694b6078c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f99a7ea3b5be.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://uploads.strikinglycdn.com/files/d364f7df-371a-4acc-b0e9-ad55bc839b8c/biderenimuviruxidipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bc41baa-46a3-4390-a40c-e77cae1b14ec/77316960470.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/rowos.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/monibigazisonuxizobisurul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5329380f-aa28-4a22-b6b6-c992724f6b99/the_innamorati_commedia_dell_arte.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc52aa9f-35df-4c1a-9a2f-5df400a8f181/dofabarulomibigipo.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_off0000d304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD304 5312 bytes
SHA-256: a121b65f015d486e523c36617db45c8a34c185f22e7d3679b928777c25ea97f0
font_01_sfnt_off0000e4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F5 9728 bytes
SHA-256: 514820369bf118fffe0aef91f5e44feabd1f3ba98873ecaa18e1f95855a855fd
font_02_sfnt_off0001063f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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