Malicious PDF — malware analysis report

Static analysis result for SHA-256 587737363ab57d39…

MALICIOUS

PDF

66.6 KB Created: 2020-11-25 01:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 216aa5e58b262ff470ec750ad831d2a2 SHA-1: 9b1b5bcad1753594acf679b24309c884ea72ad5f SHA-256: 587737363ab57d394051a1f56b672b9b3490afa0a5f696c23119170c167b899a
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://traffnew.ru/strik?utm_term=i+dump+your+ass PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5fa81c154fc20.pdfIn PDF document text
    • https://zagarete.weebly.com/uploads/1/3/4/6/134687236/desuzirer-zukusoju.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/kupifadamuzu_fijojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369501/normal_5f8c26f03ca91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_5f907d780ff1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5fbd9c1f91df5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450730/normal_5fa23355567d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/exercises_simple_present_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fac8613-066d-4b09-8856-037295643ef3/100_pics_catchphrase.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/58994869476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/302cdb83-8b0b-42e9-9cd7-ff0286f4559f/lodanogivuxiwabejikodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d05d5825-82c8-4278-b607-49450c62b94e/jesus_washes_disciples_feet_john.pdfIn PDF document text
    • https://s3.amazonaws.com/pukasojalu/tifavogoworasudu.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/converting_liquid_measurements_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/zujomonarap.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA14 5112 bytes
SHA-256: bf7eadd9b1d83c95275571d34d3ddbfb641e3b29da1b2585c9f45c2bb04dee85
font_01_sfnt_off0000db61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB61 10096 bytes
SHA-256: 9df6892e885910808a3c26f3c7d9cf737030d8ff411025d4135c4d0f0ca4fb3e

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