Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c38cb92cadb2369…

MALICIOUS

PDF

75.5 KB Created: 2020-11-12 19:16:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a905ec1a5a78eb249a205194c5a7f5b8 SHA-1: d69020a48573a800017da2c2736dcadb579c4bcc SHA-256: 6c38cb92cadb2369d40a4c3666ff0b2dff3dfa390c1186eddf37dcdd736982ed
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 0.9997

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://trafffe.ru/123?utm_term=patron+saint+of+athletes+christopher PDF link annotation
    • https://vonizimawat.weebly.com/uploads/1/3/4/3/134385064/1c0b70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401558/normal_5f98c5a999a8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456134/normal_5fa416c581db5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_5f9337fd4b8d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380694/normal_5fa225a3bb598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f9ec6fec17a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/divikufifir/new_york_2140_free.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/83328551491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e9a8217-2f08-43ea-957c-2ee171d03369/80496524989.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/24172079309.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/wetaganobugiselutigojojiw.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/94969862624.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCF 4892 bytes
SHA-256: 4e66608575ebf6be87d4c73a40bfa92d2c5d16d5a9a79e8eb583bb78435688ad
font_01_sfnt_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 10532 bytes
SHA-256: 3bac3c2478dbed991e03f9c6e746344caf275e68b981929fcf5a2e8eabb39c83
font_02_sfnt_off000110ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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