Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e75c252897112f…

MALICIOUS

PDF

59.8 KB Created: 2020-12-17 06:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 65f859f8dcad5d396386837280054df1 SHA-1: 9c92b5572ea6f407e9336d8249cce16dcf830ee6 SHA-256: c4e75c252897112ff9369201b81165ecad93c8285378d3db95408a6a9913bedf
186 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 0.9996

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://traffine.ru/strik?utm_term=together+is+better+simon+sinek+pdf+free PDF link annotation
    • https://molisemopum.weebly.com/uploads/1/3/1/4/131437834/2db5cf.pdfIn PDF document text
    • https://wejorawifaloju.weebly.com/uploads/1/3/4/4/134458418/zulesej-dotor.pdfIn PDF document text
    • https://fojaxekixuwid.weebly.com/uploads/1/3/4/7/134743661/nipagekesonu.pdfIn PDF document text
    • https://meritogaxubov.weebly.com/uploads/1/3/4/7/134767100/kipulivudozonemurut.pdfIn PDF document text
    • https://vubisurajoguv.weebly.com/uploads/1/3/4/2/134265568/88af4d157edee.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/60f72ab0ffff.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/nefewubomozimizo.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/henghuili-files/6634848264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49e04fc-984b-4aca-b7c7-f7fc327ae5f6/sat_math_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d0839f7-2110-467b-984b-ce1ff33a2fe4/witcher_3_hanna_aus_den_wldern.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/nivebajovedi.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_off0000ad4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD4C 5368 bytes
SHA-256: 2fdfaf753bf9b9e71b7ae8e95e7fe27b9629465ee6c417768c3cc5e7401ad751
font_01_sfnt_off0000bf62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF62 10880 bytes
SHA-256: 92205368216f6acfada8513d365b5699b5d1ff4e948e2984896375f6516c565d

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