Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ec5c8a3d522772…

MALICIOUS

PDF

70.0 KB Created: 2020-12-20 12:10:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1bcb1169b1c0cfa5e9633b0bcf408f32 SHA-1: 9c5119949e59b965771876ec3baba9ec6a94ab92 SHA-256: 44ec5c8a3d522772d5ae39cf10afaee9322e05053c5de629d1a2ff804a3cbfa6
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 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=white+crested+black+polish+chick PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393900/normal_5f90599eef4eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5fb3cb29c5ed2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fce5336190b057dd3805866/t/5fd15ef39a9e5443ac6c4f7b/1607556851465/bunny_rabbit_paper_craft.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/44939063887.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/nature_slim_keto_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b45d76-3a3a-448f-a7ff-2f3978bd96d3/43723062349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dbb7ba5-63ab-49ad-8d21-1a35e16dcb6a/16924430528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43244a34-da01-4385-9f50-9b21567dbdb5/2018_uniform_plumbing_code_illustrat.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/binge_eating_disorder_articles.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc362e5c30a162e0c62626b/t/5fcbf148eb18547f4b6d8a80/1607201096615/bucketlist_bombshells_bad_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69bb9ce6-6a2d-4788-b6fb-c2b3cb5e66e8/mimuwovobex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d04a97-f64c-4521-877b-ee4dce125951/xetavagotusepiparipezupug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c2b3525-5d5a-4496-b523-f3b6f88b0a93/hymns_old_and_new.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c0ce06-2813-4b7b-875c-f1b535a089b1/double_star_pokemon_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/958e44f7-ccff-4976-a9ca-5f995de1526d/biblia_de_la_santa_muerte.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD486 5380 bytes
SHA-256: ef2665c668dcf5ebca17b8b427309f8f05655624b34ac9d30641dc22feaf1410
font_01_sfnt_off0000e6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D0 10628 bytes
SHA-256: f73559fca6ca138c89e6b4c6b5530e2cbf62e9640fb8bd60f7a5892f7f93e120

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