Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4182547aea60ba…

MALICIOUS

PDF

83.8 KB Created: 2020-11-30 07:51:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 499e46eee596c0293e7b4a922fda4cfc SHA-1: 91b2fc9c7d1e13f213ca05746df0c657a6192d59 SHA-256: 8b4182547aea60bae625ed39d753829a82b330f78ebcaf0d3cf3282aeb60fb8f
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 0.9998

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://trafficel.ru/strik?utm_term=nucleic+acids+molecular+genetics+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382613/normal_5f975ee1ae779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394072/normal_5fa76a988a6ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_5f989ef885e9e.pdfIn PDF document text
    • https://donumidivapog.weebly.com/uploads/1/3/4/7/134734387/7747483.pdfIn PDF document text
    • https://kimiragijasem.weebly.com/uploads/1/3/4/0/134096233/e7a33071f55fc12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483589/normal_5fa7272d4e3fa.pdfIn PDF document text
    • https://wirufaxiferid.weebly.com/uploads/1/3/4/5/134599318/4176720.pdfIn PDF document text
    • https://vekaluledezo.weebly.com/uploads/1/3/4/2/134235689/c202dcd22738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410976/normal_5fb2cfdb55896.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/fotojipifuzitul/folagitefisuniduvob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8add188b-191e-48e9-a408-bd39c8a74824/bose_vcs-10_review.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/sevemuzibewu.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/xipegufiwewezi.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/87696751566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b9bc61-ca82-48c3-8c79-23f1ef4bd9e0/57932852811.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_off00010255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10255 5476 bytes
SHA-256: 22d084ab5dbe9bc53b23ed497a9e23354640c343eb397558ab8888ddecf875fd
font_01_sfnt_off000114dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DD 13368 bytes
SHA-256: cc6fca470fb1c9acd554948f1cbc43121bf1c0d9cf9ec31caeaefaef58ad8c83

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