Malicious PDF — malware analysis report

Static analysis result for SHA-256 7302bf0881d9839f…

MALICIOUS

PDF

69.7 KB Created: 2020-11-25 08:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e3996c9c2eeb7aa245d3907e796babdf SHA-1: 1b536521ae71f724b905be7c02cf65616984c1c8 SHA-256: 7302bf0881d9839f782eea7f20df697ee78680c452118c1f8a6c938289bacbd4
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. The PDF contains a large number of embedded external links, indicating a link farm or phishing attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=pitbull+puppies+for+sale+in+chicago PDF link annotation
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/03ebb52e3499506.pdfIn PDF document text
    • https://ziwirekow.weebly.com/uploads/1/3/4/5/134529616/9aad304290da6.pdfIn PDF document text
    • https://tibijipobarak.weebly.com/uploads/1/3/4/4/134493900/a30e8a.pdfIn PDF document text
    • https://sunawakajisume.weebly.com/uploads/1/3/4/3/134324988/fipezak.pdfIn PDF document text
    • https://fixasamajiwige.weebly.com/uploads/1/3/4/3/134318971/xalidubolegu-xazugu.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/gixawetopoli/gazumufupabe.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/wrought_iron_table_legs_36.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/daru_badnaam_video_song_hdyaar.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/tijezinifexugapap.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/zefetedusijaxufi.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/aiag_manual_fmea.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_off0000d25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25E 5420 bytes
SHA-256: b645e71e4f29d10cbff2517c686c185631b2f3bd060b175b879ae9742ba1a028
font_01_sfnt_off0000e4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C2 11020 bytes
SHA-256: 398ba346db77509ced9ee01b31f441b71eac965591825407e38c61b29681d03f

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