Malicious PDF — malware analysis report

Static analysis result for SHA-256 28af633628d5b072…

MALICIOUS

PDF

71.9 KB Created: 2020-12-30 17:18:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4eaada71805779fcbea45c818f0a44fd SHA-1: 9a0182a02d768fd30c17c84f18cc5f3878044c75 SHA-256: 28af633628d5b0728e1a191aa412851708a68207485599420a8b48bc603b199d
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=free%2529+color+world+go+launcher+themes+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4472768/normal_5fcb4c132d963.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402486/normal_5fcf928f40bec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382782/normal_5fd142bc9c207.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426828/normal_5fec3ca43c857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490140/normal_5fb6054f273ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_5f87cc3f909a2.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/e8bb15ff-345a-4320-9307-95ac67167337/45799581114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1b14a6c-2957-4d05-b41f-8635cf658d65/jonik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507ef052-7b24-458f-b25c-88bf891422be/fivetikuzigema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/986746b9-16f6-499c-abe1-d8eba932b3bb/mijiladuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c5f02c-985d-4645-8a38-09451dcc3938/hoi4_command_console.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f338d3a-c9a6-45d3-b850-314b2ca8aaa6/97059562049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a506edd7-7e94-4351-a511-6f4623b0d8b3/275857730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c39f66d-47bb-4ec1-9e20-768907921bbe/regular_and_irregular_adverbs_worksh.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23F 5560 bytes
SHA-256: f7bead9b915c3309363e481066f110648897f9784dd9ec8a64b7e305d61da738
font_01_sfnt_off0000e513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE513 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000eda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA1 10588 bytes
SHA-256: 7a85b438997423a600425c2cdbce830142da613af0cdf53808ec510d7889c0aa

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