Malicious PDF — malware analysis report

Static analysis result for SHA-256 215d1fe2a381f5c0…

MALICIOUS

PDF

68.3 KB Created: 2020-12-19 02:52:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 053bd1bc759fc121d004e0079a33d04f SHA-1: 5079003986669c834f2f57d920bbe2ff8cb466d3 SHA-256: 215d1fe2a381f5c0ae62955b90cbab977504f6321bd39e80d6a1610e7d343dc7
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO spam or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external links, with one pointing to 'https://traffking.ru/strik?utm_term=marina+village+san+diego+hotels'. While no scripts were directly extracted, the presence of embedded URLs and the nature of the link farm suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffking.ru/strik?utm_term=marina+village+san+diego+hotels PDF link annotation
    • https://rifeseroki.weebly.com/uploads/1/3/4/6/134698736/pibud.pdfIn PDF document text
    • https://wifivufadabigo.weebly.com/uploads/1/3/4/5/134522009/5299268.pdfIn PDF document text
    • https://doketilid.weebly.com/uploads/1/3/4/5/134529618/8723139.pdfIn PDF document text
    • https://gogidexiveje.weebly.com/uploads/1/3/4/7/134762038/229807.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/faluzotixupi/73024830422.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/49183872710.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/68587858097.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/big_data_hadoop_video_tutorial.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ebbeff13940aa24cd01f/t/5fd1e62beeaf2774ac8fc10d/1607591468433/clue_game_replacement_sheets.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc141b28ef7301f8b131a8a/t/5fc9966455485c3109ab0a89/1607046758771/lokimonowazovomavu.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_off0000cf66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF66 5152 bytes
SHA-256: 0bc43537f13e24a541bb440fb20e5ac82b9ccce679abea4da163b33155b7fc71
font_01_sfnt_off0000e0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F5 10616 bytes
SHA-256: 2d2d6b5ebcc989c8248f781b012416e294aa5a2e685782f9d1280583b1c8532b

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