Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c70aef458df1c8a…

MALICIOUS

PDF

64.2 KB Created: 2020-11-22 05:14:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3ea75e3e3f24860466533a3ff8352583 SHA-1: 966548a5421c27139a5052e7b86d754e91468b9b SHA-256: 6c70aef458df1c8ad87605a9e926f72e004e763b549cd354a638213018212595
164 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. It uses an urgency-based lure. 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=incident+reporting+ppt+slideshare PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f99aebf7af6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5f889b79a2358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5f922c2824d45.pdfIn PDF document text
    • https://xekigugoraka.weebly.com/uploads/1/3/4/4/134434326/dolopumede_nofozominak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_5f92359a4ac02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427094/normal_5fb35dc7c4297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460072/normal_5faa092b7c2b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498392/normal_5faf076ab6ac4.pdfIn PDF document text
    • https://mirigemiw.weebly.com/uploads/1/3/4/7/134753474/6044874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446283/normal_5fa06e9da527a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_5fb516821df56.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/308d69b6-d6b4-4b17-81a3-5e1aec8b27e2/general_college_chemistry_1_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a43e546-b904-410e-8087-62e59b72eff5/59587610408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9211512-19e4-4d54-bbd9-849fb703a9f8/3678721412.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5F 5272 bytes
SHA-256: 55b977db1a3bdbf3ae3d0211fcbada02a09ec4fe498dcbf59c8069dee44ca536
font_01_sfnt_off0000d048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD048 10540 bytes
SHA-256: 216ede38f735752d9b91240d0dde02d20baf0cfd0b682bb6cd0155f5caceb3cd

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