Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ee6b1c39d05c1a…

MALICIOUS

PDF

92.7 KB Created: 2021-03-03 00:29:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 95e3065c254b46751a8bd686d8e58094 SHA-1: 57c4f1b7bf7ad9ec95979d7b64ffae784fd63388 SHA-256: 48ee6b1c39d05c1a65785c263d37bfa7807e2f5db36cd8a1bb5aaf8532018fb8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/123?utm_term=movie+maker+app+for+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425230/normal_601eedd000616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393180/normal_600d7c32901ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_601250167ed08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489969/normal_5ff26fc633ee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447095/normal_601fff3e57cf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415524/normal_603c8a6697cb0.pdfIn PDF document text
    • http://bukenisefino.mygamesonline.org/xosanaxuxunixokegopulo.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/66676584021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_5fe629123e8ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_60226edea9221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427268/normal_6035373d4ebd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408348/normal_5fd8d7f8c5a22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_601fab0f28cbf.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/51201082709.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/vurafiliwarerezepalixup.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/64361940266.pdfIn PDF document text
    • http://tamupevex.rf.gd/nenoxujegi.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_off00012edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDC 5080 bytes
SHA-256: d7011667a1d8e13d79e3527def75d9c6465cc0e858b1598f9bea1b4caa91dea8
font_01_sfnt_off00014028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14028 11100 bytes
SHA-256: b9d67e4c20c146748dc554c1716ee5c09f58a3ed08f85d205922c808f550cae0