Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe38ac6629fc2be…

MALICIOUS

PDF

93.9 KB Created: 2020-12-27 19:56:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b49e13c15a206a8fe7f97a5c541f5f16 SHA-1: 3251739117a8f4502523253b701614a208bec88f SHA-256: fbe38ac6629fc2be65fb0c32380e7e289d05139108d4cfede90efd207b81b5c6
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 0.9997

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://trafftec.ru/aws?utm_term=persona+3+hierophant+social+link+guide PDF link annotation
    • https://wimavebitajiki.weebly.com/uploads/1/3/4/6/134609796/notabut_pexijonoxe_nizaxuxojumix_pujufowufonin.pdfIn PDF document text
    • https://wevupifusa.weebly.com/uploads/1/3/4/3/134356286/3822842.pdfIn PDF document text
    • https://vaguvijag.weebly.com/uploads/1/3/4/6/134610999/249830.pdfIn PDF document text
    • https://fosozenasavo.weebly.com/uploads/1/3/4/8/134889966/6040719.pdfIn PDF document text
    • https://zegaxazidunuxe.weebly.com/uploads/1/3/4/7/134746987/8926039.pdfIn PDF document text
    • https://repenakexo.weebly.com/uploads/1/3/4/6/134600143/jukepuxoxujak-bobogobu-jevobipe.pdfIn PDF document text
    • https://ponebivilu.weebly.com/uploads/1/3/4/5/134505494/d5375453.pdfIn PDF document text
    • https://milunuxuv.weebly.com/uploads/1/3/4/5/134529922/840eb.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/fosalizuzu/bounce_fabric_softener_sheets_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac61332f-2bbc-4403-bc2a-823834dec2ae/jolojugekajesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ccb4e0-572c-4724-b723-e296d62c4b4a/instagram_chat_online_status.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da2d167a-318c-4206-bf00-235f64e428b5/47773004775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe186918-4ca8-4c8c-9195-8d853ec5f45e/air_flow_research_bbc_heads.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_off00013179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13179 5564 bytes
SHA-256: 6f81920329ff8f01c1eff252315a1de7073fa9f8fee02e8887dd90506e766503
font_01_sfnt_off00014459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14459 11100 bytes
SHA-256: 7e9d5ea724f7241535901ed4665ac2d6c4404a67ce942c5d9614ae27ab090b83

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