Malicious PDF — malware analysis report

Static analysis result for SHA-256 655c3119057c09f9…

MALICIOUS

PDF

88.3 KB Created: 2021-01-07 03:15:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bf46778e7be43032f1c5dcc7ac0e7899 SHA-1: b55d8030d2ec751cb50d1217f409d4469e07b1dd SHA-256: 655c3119057c09f962f61dd4a13f0312206584ce79072588a71016216e459198
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. The document contains numerous external links, with one prominent URL pointing to 'trafftec.ru', suggesting a phishing or malware distribution attempt. The presence of PDF_SEO_LINK_FARM heuristic indicates the document is designed to host a large number of external links, likely to manipulate search engine results or distribute malicious content.

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
  • 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://trafftec.ru/123?utm_term=decision+making+in+finance+present+value+of+an+investment+road+to+%25241+million PDF link annotation
    • https://ralirepiputup.weebly.com/uploads/1/3/4/8/134852471/48030.pdfIn PDF document text
    • https://cdn.sqhk.co/jufulezamuko/geXSgdi/wufefol.pdfIn PDF document text
    • https://cdn.sqhk.co/tiruxugajo/jggphjO/ark_survival_evolved_ps4_gameplay_ita.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/hjzzie5/shield_of_shelter_insurance_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/samivegin/Vchjuih/land_rover_off_road_driving_school.pdfIn PDF document text
    • https://cdn.sqhk.co/jisofoxabap/0raLF4F/86012952889.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450628/normal_5fef0c3ae820c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_5fab65fa373fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5f8f599f2679a.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/purufiz/accrual_basis_income_statement_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15da6c7f-5830-4b5b-b412-fd576b6a9057/timex_marathon_tw5m14300_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/49982252526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07fe8d77-3280-4f5b-b914-f493279c304c/98059827383.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 1

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_off000117c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C6 5888 bytes
SHA-256: b4fd7ecedb9ccb8c94d8fe61d892ad032c337f39eb51f5ffdd504b4c9de6f747
font_01_sfnt_off00012bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDC 11668 bytes
SHA-256: 7fb2bab6156f99333098042f0a880b23ac3c2836c7f084539a083ed48b85fb93

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