Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc79817c6f9644b…

MALICIOUS

PDF

70.4 KB Created: 2021-01-26 18:04:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 18ef59c8f2e60b096bfc388a83ffcfbf SHA-1: 988bfb0a7aec2f9ca4e84584d432b95745a302fb SHA-256: ecc79817c6f9644be111f6d7fd4271e6f9e9c00001dd3285dafdb2cbb9c8739c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly 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-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://jottigo.ru/aws?utm_term=vector+banner+background+ai+free PDF link annotation
    • https://metidesu.weebly.com/uploads/1/3/4/4/134492072/6446430.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/fRBCAgi/48688377772.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/hb2ieja/tamitobazetokemimudag.pdfIn PDF document text
    • https://mujolimu.weebly.com/uploads/1/3/4/8/134868529/pimula_karulevi_nalawodolesakeb.pdfIn PDF document text
    • https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/3884557.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/Mn4iKig/dapewanikegol.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/vivena_xatenobo_xumuvego.pdfIn PDF document text
    • https://vemomomofaj.weebly.com/uploads/1/3/2/7/132740815/7748202.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/feliso/tisud.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/30014815883.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/branded_formal_shoes_company_name.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/lavifajevasigifejuwoto.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/komibodojosofa.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/cabinet_vision_free.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/funemowapak.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/ball_bearing_designation.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/gnossienne_6_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/kepafukiromabuwulinedal.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/tegabotabazuku.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/29483218237.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_off0000d9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DC 5148 bytes
SHA-256: 63f9be790f68ee73a6891891c7aa57985df2ebff4fc9d73b5e75edb778e9603d
font_01_sfnt_off0000eb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7B 9764 bytes
SHA-256: 433c7107b17695f53fec3e09e2988f9dbeb9f953a2989791f743b913e81782a9

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