Malicious PDF — malware analysis report

Static analysis result for SHA-256 df60409509891f5a…

MALICIOUS

PDF

74.7 KB Created: 2021-04-11 17:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3c848d75304109960b1f369c1305ab10 SHA-1: e72d3e503a51fa5f9b3e2951a518ac6391fe3622 SHA-256: df60409509891f5a6a3eecbb090b1df11073b1780b32d83663c7f6927e08b83f
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://maypoin.ru/strik?utm_term=which+is+better+llc+or+c+corp PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485703/normal_603b629d504a8.pdfIn PDF document text
    • https://jefamiwufilidiv.weebly.com/uploads/1/3/1/4/131409158/c2f2ba2bcb7.pdfIn PDF document text
    • http://artistichomesolutions.com/84487397788hs7px.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450418/normal_605f78506aa5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484618/normal_604dcfff337bf.pdfIn PDF document text
    • https://wubepifumemav.weebly.com/uploads/1/3/4/1/134109226/90b9d6ada.pdfIn PDF document text
    • https://zemaxixose.weebly.com/uploads/1/3/4/6/134636511/vuferidevojal_lakuxuvisaro_gonexu_lifivin.pdfIn PDF document text
    • http://docita.fun/asheville_nc_police_accident_reportspqn2j.pdfIn PDF document text
    • https://vasetovomakoti.weebly.com/uploads/1/3/2/7/132741031/30fa07b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409110/normal_606ea5cd13f20.pdfIn PDF document text
    • http://aycotoro5.xyz/the_five_love_languages_quiz_for_familieso1xst.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/4600136.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/xopugup/66563514571.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/un_curso_de_milagros_leccion_149.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/10747268930.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/dujuxonufusugofol.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/kaziwojuwubofekumimakefo.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/14101371080.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/denver_antenna_tv_channel_guide.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_off0000e836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE836 4964 bytes
SHA-256: d6cb4808c1a3fed1e692cc7af3a01f7407a27d9de055559d43cdf4049bb7868e
font_01_sfnt_off0000f920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 10772 bytes
SHA-256: 8d00c50198e1a9a51b007ef325ee12ed9bab5ebf0efa50abe23a339fec12222a

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