Malicious PDF — malware analysis report

Static analysis result for SHA-256 92bc7a61fc42fa5d…

MALICIOUS

PDF

75.5 KB Created: 2020-11-16 18:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f4b5eadda9402058a39d32da063757a3 SHA-1: d5e1532341157122c8f23be87dd660b7c1667f7a SHA-256: 92bc7a61fc42fa5d8da21a13d7593c0b3dad4f9265b5183686dd606a353ea224
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 0.9996

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=eat+at+joe%2527s+myrtle+beach PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451574/normal_5fa531536a3ff.pdfIn PDF document text
    • https://berajuvexoru.weebly.com/uploads/1/3/1/8/131860787/d95dfb.pdfIn PDF document text
    • https://momaramurelu.weebly.com/uploads/1/3/4/3/134309976/lipamabip-virofi-mavefosulo-tizowadepilixug.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/4c47b51e-174e-4fbf-9ef9-cbcbf8008b03/59499936175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4120ca1-abd9-4050-bf63-14d682fffbb8/58929158247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edaa1e27-d2b7-4fd0-9fca-bfb2def3b14f/woposovigimidimibadesufig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09b06bb-5066-4a0a-b884-ea5332871a43/54773644098.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/as_3740_waterproofing.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/34618961463.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/95378355773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf8c982-7d4c-4ede-9b00-de5d498199a5/eternal_magic_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d5efa07-ae4b-4d5b-a4d3-9fd8ceb463c8/ionic_bonding_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f8e723-357c-4336-9e1f-da2860eb2085/68125585932.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/a_h_almaas.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/58649172748.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 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD028 3876 bytes
SHA-256: 6c367731131df1d4f56ae8460a3491b6774ae07f132fad53cbe3fc2d2a42e3c1
font_01_sfnt_off0000dde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE4 5348 bytes
SHA-256: 4f61a628474273f3355bcf061200cf2980a0c4b23a64cbd945474caf361585f2
font_02_sfnt_off0000eff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF7 1736 bytes
SHA-256: d88acef2f1503c2d36a8ed78cd414078dcf73965ef7014107e14dc134918970d
font_03_sfnt_off0000f87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87D 11108 bytes
SHA-256: e06c80c55a79675efef3e3f938999ef164742b86e23a0875c190295a677d283c

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