Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea6d449da927c8a…

MALICIOUS

PDF

77.0 KB Created: 2021-05-22 02:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c38bf6a5e53f7713ae286856ae3eff90 SHA-1: 70e20fccdfe51312729670ea966ab2c7563263f2 SHA-256: 1ea6d449da927c8a5fae20627f80b0e0f85f478c497ccb7162fab33ff917e3cf
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with many pointing to disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=printable+bulletin+board+letters+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372101/normal_5fca94cac954d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379964/normal_5fe4a321207ab.pdfIn PDF document text
    • https://banatili.weebly.com/uploads/1/3/5/3/135314160/jiwom-zidez-waretiwo.pdfIn PDF document text
    • https://gopogusefivow.weebly.com/uploads/1/3/1/4/131406686/jetafigitaweferavazo.pdfIn PDF document text
    • https://relulime.weebly.com/uploads/1/3/4/3/134384492/68d87234e996f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401972/normal_6030d363afcc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481522/normal_601615e35fe37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475382/normal_6063eb239d1d0.pdfIn PDF document text
    • https://soxigirotum.weebly.com/uploads/1/3/0/9/130969819/8225856.pdfIn PDF document text
    • https://sedeberelaniku.weebly.com/uploads/1/3/6/0/136030724/zivuwi_lufijuluteni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488346/normal_6010c69b24df7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489257/normal_602a774f18329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413235/normal_60141103495e0.pdfIn PDF document text
    • https://kodavagimiwebod.weebly.com/uploads/1/3/5/3/135346487/sijiwu.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/138f30af-cf8a-422c-b927-9b70553853d5/82309620036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6096d04-c9f4-40e9-b6b4-3aaa5a15a85e/tutorial_gimp_2.10_18.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb867367-385a-478d-ad99-869f23805a0b/wotebumulamovatijan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a23639fe-9640-478c-9ac5-e0766c12f76f/matlab_minimize_function_of_2_variables.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_off0000e65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65A 5176 bytes
SHA-256: 56e7c9f44b4e832ba76c14e9b6f5c2bd5c2dc8a6c28b9d5620e425e0da25959b
font_01_sfnt_off0000f7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7ED 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 11108 bytes
SHA-256: 4ffe649fcb23332d8a4522dd58789c5e106aa85f6deb864f97f0e67199beb4dc

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