Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f6d3ce0c0ae1b1…

MALICIOUS

PDF

101.9 KB Created: 2021-02-07 14:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 24b6748b9d3ae64384c3c31168b3d019 SHA-1: 107100957edf79911eb3f96d06b103bc3643e862 SHA-256: b0f6d3ce0c0ae1b1813a6990d75fe796f367d00fd0fee8835c41a0cccacbffb5
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=kimberly+henderson+myspace In PDF document text
    • https://vobulesije.weebly.com/uploads/1/3/1/8/131857334/sogenifimir.pdfIn PDF document text
    • http://secureappeal.com/area_of_a_triangle_worksheet_with_answersdmfpj.pdfIn PDF document text
    • https://mepapezivodeno.weebly.com/uploads/1/3/0/9/130969154/raxejik.pdfIn PDF document text
    • https://fenikazegalo.weebly.com/uploads/1/3/1/3/131379965/3701669.pdfIn PDF document text
    • http://mediaverifiedbadge.com/54779140098ow2wt.pdfIn PDF document text
    • http://chebsvet.ru/70791989098ua2uz.pdfIn PDF document text
    • https://rabofabi.weebly.com/uploads/1/3/0/8/130813834/witorelivadufof.pdfIn PDF document text
    • https://laregupofonel.weebly.com/uploads/1/3/4/4/134464195/620fe.pdfIn PDF document text
    • https://suxamoka.weebly.com/uploads/1/3/4/8/134876373/gekasaxoxudu-pevuporufe-romiz-novoko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bexadujozopu.epizy.com/3886763562.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/12195270979.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/zetum.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/examples_of_abstracts_in_apa_format.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/63868335038.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/arcana_famiglia_sub_indo_mp4.pdfIn PDF document text
    • http://finesegugumemo.epizy.com/79473650096.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/1468576805.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/qld_tv_guide_wide_bay.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000143e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E8 5524 bytes
SHA-256: 3eb67435ea299d8dcd2862c988250d7f37c72272a7b2bc27d6a1fe02ef04c845
font_01_sfnt_off0001567f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1567F 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off000161e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161E2 11852 bytes
SHA-256: 13def1b0a030060dd6286ecc8d8e717d61d8406a954e061d771dfac1bc21d116

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