Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00693dc78c54fab…

MALICIOUS

PDF

71.0 KB Created: 2020-11-13 10:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e9676dbf899a78cf165b732149a6d1ec SHA-1: 1923edf5a1458c4294cece4eead67f8eb4c8ce9b SHA-256: c00693dc78c54fabc507aad1262687ce3fae91d0dc1080202272153c8eb82e05
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, appears to contain search-related terms, reinforcing the idea of a lure to external content. The primary function seems to be redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://traffnew.ru/123?utm_term=did+dale+earnhardt+jr+get+married PDF link annotation
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/jifixatunos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480402/normal_5fa9a03895ad1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391024/normal_5f93c001ef1c1.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/6242828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_5fa9d6a6a02ad.pdfIn PDF document text
    • https://kulirudezu.weebly.com/uploads/1/3/4/5/134583820/bea5a66a3a.pdfIn PDF document text
    • https://begaraga.weebly.com/uploads/1/3/4/6/134652864/goxobokabawenukokari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f871bb211109.pdfIn PDF document text
    • https://bekarofadu.weebly.com/uploads/1/3/4/3/134346179/3133786.pdfIn PDF document text
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/nenedimomife-sojezez.pdfIn PDF document text
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/134d576031.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/a93bdc6a-6268-46f9-983a-7a45f2d46f44/lefewobuzometutaxam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5dbb57a-bd17-4ed9-90cf-9347d7172918/522300175.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF43 5136 bytes
SHA-256: 062aaf03368054ae3b208a4930556d1f72921fbbcc94656ef51e625a14f85304
font_01_sfnt_off0000e092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE092 1852 bytes
SHA-256: c879d4b0210e847162f2c6d686728d124bd1d841235a0c83932700cac93a3561
font_02_sfnt_off0000e984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE984 10764 bytes
SHA-256: 04a8208de57407ecfaca18e1c5d84bb3786f0837a8dfec4fbb94c57c3e70ac57

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