Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c57ec4145c55a85…

MALICIOUS

PDF

77.6 KB Created: 2021-02-01 19:52:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d59bac2dc186f9499fdd0eb8e4b2bbbb SHA-1: 44ecfd9a02170fb370da4bae88488e21ee4c449b SHA-256: 5c57ec4145c55a85bd9e2bc15616a234b07d00bca096dbe58a85c96deee0ea8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=palabras+con+que PDF link annotation
    • https://dazuzoboda.weebly.com/uploads/1/3/4/0/134017564/55659.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/awgiPjc/interesting_facts_about_yourself_interview_examples.pdfIn PDF document text
    • http://snapchat-alert.com/kofanuxipimerudij36tx8.pdfIn PDF document text
    • https://lizatupapej.weebly.com/uploads/1/3/4/4/134401074/f5c72f1a75b.pdfIn PDF document text
    • https://xeligedijeka.weebly.com/uploads/1/3/1/0/131070237/9054c0c82.pdfIn PDF document text
    • http://reduslimer.website/terubovigfjnc9.pdfIn PDF document text
    • https://pudesuvake.weebly.com/uploads/1/3/0/9/130969082/barexodab.pdfIn PDF document text
    • https://fomemavinujidi.weebly.com/uploads/1/3/1/4/131414297/jisusukimujor.pdfIn PDF document text
    • http://migerov.xyz/81783976679jigc2.pdfIn PDF document text
    • https://cdn.sqhk.co/lebereme/hghCjfW/srs_airbag_english_meaning.pdfIn PDF document text
    • https://fanarise.weebly.com/uploads/1/3/4/3/134377412/5ca692.pdfIn PDF document text
    • https://vesovagesigopek.weebly.com/uploads/1/3/4/6/134614223/zuzivuteliparelikuda.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/vuxirefare/caslon_antique_font.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/animography_template_ae_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/dixifazegelafamidavi.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/holy_tamil_bible_app_free.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1F 5060 bytes
SHA-256: 15e6156a9ae3e368c2d6ff5d8df2bf30f78bd06b3ca2012517cec54cba3f030d
font_01_sfnt_off0000ee63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 11076 bytes
SHA-256: ee1b2d93871a71e7381f9e32372f5cc447c5af28367241917591989c75de5b49
font_02_sfnt_off000112f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F7 16120 bytes
SHA-256: 243d73e361d56b8e053a272f0189cb760bb853cbd1de481a186df7a1adf1cd45

Open this report in the interactive analyzer, or submit your own file for analysis.