Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2cc0446cd9fce5…

MALICIOUS

PDF

69.3 KB Created: 2020-12-23 15:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 738411a882f471663e53e83c5f10df09 SHA-1: 0f3795f848dc3f4a06561d80bf56eb0d011e8fbd SHA-256: 0e2cc0446cd9fce5ac08b5e7c8f66dd4f132a80f89a8c8144d2b463696d45dec
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful sites. The primary malicious URL identified is trafffe.ru, which appears to be part of a phishing or malware distribution scheme.

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://trafffe.ru/strik?utm_term=my+singing+monsters+dawn+of+fire+rare+monsters PDF link annotation
    • https://lusefova.weebly.com/uploads/1/3/4/5/134583673/246687676477ba5.pdfIn PDF document text
    • https://cdn.sqhk.co/wotezowedo/0bjhjje/enrollment_form_template_free.pdfIn PDF document text
    • https://mizunilido.weebly.com/uploads/1/3/4/3/134352057/165461.pdfIn PDF document text
    • https://cdn.sqhk.co/jasorevujoxu/Bfje2if/58509536993.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwagezo/BFPCia3/notebifatidot.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/vinuzebir.pdfIn PDF document text
    • https://xagomutub.weebly.com/uploads/1/3/4/3/134321984/zenawiko-gozakubenatej-lefetarefe-vobuxenekizes.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/RBi5tuP/bootstrap_crud_template.pdfIn PDF document text
    • https://kapejipe.weebly.com/uploads/1/3/1/0/131070538/263793.pdfIn PDF document text
    • https://betoxugibujimiv.weebly.com/uploads/1/3/1/0/131071043/4a3aaea9a7.pdfIn PDF document text
    • https://rijevolokawuja.weebly.com/uploads/1/3/4/6/134661742/fd3995.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/71a18c56-cb7e-4aa1-805c-e2495b427b8f/argument_worksheet_middle_school.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD285 5392 bytes
SHA-256: 2002d40119acca68dc9a53e4e3ef99cb4102bb637f8a045a6aade974d97a954f
font_01_sfnt_off0000e4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4ED 10440 bytes
SHA-256: d67ac7c8a0986618a0c0e9a72666559b966d2328974fefe67bcefecf50e048ce

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