Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e6ddedf0814dd1…

MALICIOUS

PDF

68.2 KB Created: 2020-11-18 04:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e110da8fd71a9a1d0973862d61c2bc2e SHA-1: bd92e240d1addb9c1845ccbc3ecc4e25164558c6 SHA-256: 34e6ddedf0814dd192b7f53fd58c393897eb70b73a096a0aa32dd28e57dc7674
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://traffset.ru/aws?utm_term=alone+together+movie++link PDF link annotation
    • https://jugoruzaja.weebly.com/uploads/1/3/1/4/131407370/gajusexanob.pdfIn PDF document text
    • https://fuxamuwilemodo.weebly.com/uploads/1/3/4/4/134478429/2a23e7a9ca1de7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477367/normal_5fae15d0e2961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_5f92062660d97.pdfIn PDF document text
    • https://dolujutizividev.weebly.com/uploads/1/3/4/8/134864897/fa7d4600.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/5f02b1d1-6012-4cab-b56b-a73459c2af4c/89654431226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3594c64-e034-495a-9778-ecb1e64e7616/38714970414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e9c158-f5de-4b7a-92b7-2151d41bceb0/repair_manual_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f4f3740-3753-4e9a-b287-0a03230ca11c/storia_della_bruttezza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96db99e1-d3fa-445e-bc2c-20c257edb0be/27735424351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb2fe0e-0234-425a-8722-81c6565da5c8/6938710804.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/gajodem.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_off0000cfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC4 4824 bytes
SHA-256: b186a171d20f7981b87e0caab8864804d23d74310bd44bea72b540e0ce3daa13
font_01_sfnt_off0000e007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE007 10624 bytes
SHA-256: c5ea34b476d74e9d67a553fec61d5375f37788b8c7a098f1f44f0644478401a3

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