Malicious PDF — malware analysis report

Static analysis result for SHA-256 11139a934d781107…

MALICIOUS

PDF

75.4 KB Created: 2021-05-26 07:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 66bbabd7c5f1b3605f181b752b233738 SHA-1: 10623fc58fba81152680829c269e49ddb41b666a SHA-256: 11139a934d78110705fbf502136b45b43c93014cfa017b87036fb19d5d8216dd
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://mezovuduw.ru/strik?utm_term=minecraft+dungeons+free+download+pc+windows+7 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469836/normal_6001eb783ae68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_601d35f543712.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413969/normal_604cd300455c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467277/normal_60252fdf8e6fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451549/normal_60376003bf6b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_600f1fd59ab6b.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/5a40c93ed02fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_6049d44cbbdc2.pdfIn PDF document text
    • https://wuluruvujomokax.weebly.com/uploads/1/3/5/3/135349857/jozijetopiso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478408/normal_60215f8132595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403817/normal_6021bebc13924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447098/normal_60337390d230c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489057/normal_5fef7cd1d99ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448337/normal_604040bdda6d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482619/normal_602518fdc4202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_60495d7928d73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447662/normal_5fd071928f217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407081/normal_601dde6075929.pdfIn PDF document text
    • https://felekiki.weebly.com/uploads/1/3/4/6/134689652/238658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_604d2ac93258e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_60518cda5ab31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5fd169e5df160.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/9f5a16ae-5352-4b8d-80bd-d683305e24d4/diarios_de_motocicleta_libro_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd21c04-c7cf-49e1-9570-f6dc4b6b6f11/29743724648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdffca0d-3d14-4fa7-8d49-98184fc25925/lg_heat_pump_error_codes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 5500 bytes
SHA-256: 6e676e9b08752ab670561e31aca9a08724bac8a69a6277fa01eb61a5d31955cd
font_01_sfnt_off0000fd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0A 10156 bytes
SHA-256: 03a5a69e8c3602cc8f9a1b6a5d0a005bda1c6d0de927d0b80ce7400bea2bc158

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