Malicious PDF — malware analysis report

Static analysis result for SHA-256 28040bd091fe9dd6…

MALICIOUS

PDF

83.8 KB Created: 2020-11-27 10:45:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7419ba15747b6c5966957489edbe38e3 SHA-1: d23c1bb5dedaeeea8f8f99044c245a5e50f7307b SHA-256: 28040bd091fe9dd6f4c693911574f6c9bdda6cce4656e3c27a2bf05120fc7844
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://traffnew.ru/123?utm_term=perham+high+school+minnesota PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4505820/normal_5fb2ce2ded870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409420/normal_5f931a9ed59b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_5f99b3c8a1196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f89c3b76e625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_5fbf33957a058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5f8d9fad180f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad660dd2-e9cc-4238-8d4c-a56b77e526a8/52126626864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/707ac121-40cf-4fd2-a3ec-27d4431b6d20/gexolezabiduwabibususizaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db792795-159b-45b0-8a99-4749f2eba447/leatherface_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d460485-6e82-4e47-9bc7-dfe1f80e2c03/17503598812.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/friday_tv_guide_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/microwave_rice_crispy_treats.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/bodibekupoximepejum.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 5216 bytes
SHA-256: 4701f863a3efc0f3c42dfc7dc6caf14a5c6a77ff2c8d6db7e9b333006c43b48d
font_01_sfnt_off00010676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10676 7896 bytes
SHA-256: 2710c0c998707a3c34f8fd90507ba7513aa00e499f2aea365d2a4410b112e421
font_02_sfnt_off00011c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C29 11080 bytes
SHA-256: e376be44b068ab0ac4c7010cf3e78da3ace7852e9755f14b18895144db5e9fab

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