Malicious PDF — malware analysis report

Static analysis result for SHA-256 30bc98d919054447…

MALICIOUS

PDF

77.8 KB Created: 2021-06-04 16:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f46046ec692b7bf4f9c4e0c28e180e1d SHA-1: dfdaca673a6ff71d3a9d5b417c53ed99ab39176d SHA-256: 30bc98d919054447464bf1ce3263e3357f5c0a04a44c07164e7f1f7d8aea488b
186 Risk Score

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 0.9991

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://philabc.ru/pbw?utm_term=emarketing+institute+ecommerce+exam+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384831/normal_5fedd1f7d20b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462352/normal_5fcda848dc2a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417405/normal_6021969984f2f.pdfIn PDF document text
    • https://sobopagep.weebly.com/uploads/1/3/0/8/130873740/6e8d56247.pdfIn PDF document text
    • https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/waredajujedukod.pdfIn PDF document text
    • https://pezulotum.weebly.com/uploads/1/3/1/4/131483557/5241446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419002/normal_603054644cfac.pdfIn PDF document text
    • https://xupubiwe.weebly.com/uploads/1/3/4/3/134339906/8cad0aaef9665.pdfIn PDF document text
    • https://rodavilimagenub.weebly.com/uploads/1/3/1/3/131381679/deleboruwupora.pdfIn PDF document text
    • https://kusajigoma.weebly.com/uploads/1/3/6/0/136036420/a8f5b2a7de.pdfIn PDF document text
    • https://selijexobava.weebly.com/uploads/1/3/1/8/131856120/lovufamoxikawob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393041/normal_601f4660b7eec.pdfIn PDF document text
    • https://viduxetejogat.weebly.com/uploads/1/3/4/6/134600114/8711511.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/01369e3f-4861-4756-afa7-f2b338e26376/89396897921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4ea0802-4376-40d4-96d3-cb5a52b59dec/7506587520.pdfIn PDF document text
    • http://firupoxig.pbworks.com/w/file/fetch/144612945/rokuz.pdfIn PDF document text
    • http://bomasasawavi.pbworks.com/f/57194845215.pdfIn PDF document text
    • http://garewewaziwu.pbworks.com/w/file/fetch/144594465/mercedes_benz_w126_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b36d795a-c3d2-48ff-99d4-4366bca5826a/mizekexudabosaviniwuseput.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b9daa42-7e95-4f52-bbf9-b2f035455790/64486465017.pdfIn PDF document text
    • http://kafunujazuwo.pbworks.com/f/88576243421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b7a94bc-874c-4449-b798-943e242b8111/1462833434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b1c1ed2-f7c0-4196-b8c9-c58d5fa36785/70050617579.pdfIn PDF document text
    • http://xugilip.pbworks.com/w/file/fetch/144500883/how_to_use_excel_spreadsheets_for_dummies.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_off0000f3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E0 5268 bytes
SHA-256: ffcf52c6f151fecfdd8d76f287e55c9306eac033246b79a9c52cc8414e126517
font_01_sfnt_off000105d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D1 10292 bytes
SHA-256: 53293e52e91889ceb07d09efcaabf3e9b0453f8ba2a873dae03070d785678984