PDF malware analysis — malicious · fbed57827b85166f

MALICIOUS

PDF

82.1 KB Created: 2021-05-22 12:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 14777e269a7035ab703c6bee2bf2199e SHA-1: d5e2d4d6e354ee221e3102ed1c0fd33fd6a0d84a SHA-256: fbed57827b85166fc6c6398286426432eb7c8d7b4539410c7bd8bd3d59ee1073

254 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm for SEO manipulation or malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be intended to trick users into providing a password for an archive, a common tactic to bypass gateway scanning. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

Heuristics 6

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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://dafemum.ru/strik?utm_term=god+of+war+iso+psp+file In PDF document text
- https://wokiliga.weebly.com/uploads/1/3/0/8/130814475/110367.pdfIn PDF document text
- https://fadusibolene.weebly.com/uploads/1/3/4/0/134042843/lapupumusob.pdfIn PDF document text
- https://fevawitag.weebly.com/uploads/1/3/2/6/132695646/6393215.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378855/normal_60339020ba4e7.pdfIn PDF document text
- https://xokiguju.weebly.com/uploads/1/3/4/6/134679394/144cab94e13.pdfIn PDF document text
- https://romemigevowuf.weebly.com/uploads/1/3/4/3/134335991/sekamuwa_vugofune_lufin.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4444100/normal_5fe9efeed9594.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4486359/normal_60129c5e1e559.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/zunaduxa/dulixamusumomaba.pdfIn PDF document text
- https://s3.amazonaws.com/lomiwexuva/passport_application_form_online_registration_sri_lanka.pdfIn PDF document text
- https://s3.amazonaws.com/xebuvuwov/hp_officejet_pro_8620_printhead_error_0xc19a0040.pdfIn PDF document text
- https://s3.amazonaws.com/memexelu/11507152040.pdfIn PDF document text
- https://s3.amazonaws.com/tapelu/airbus_a300_maintenance_manual.pdfIn PDF document text
- https://s3.amazonaws.com/kugelilizibuwum/foxexiladezikizewa.pdfIn PDF document text
- https://s3.amazonaws.com/wefemabeni/jofalaporigodepotenavodex.pdfIn PDF document text
- https://s3.amazonaws.com/zowibatev/direct_and_indirect_speech_worksheets_5th_grade.pdfIn PDF document text
- https://s3.amazonaws.com/wiwuxot/org_chart_template_powerpoint_free.pdfIn PDF document text
- https://s3.amazonaws.com/defujo/35371081994.pdfIn PDF document text
- https://s3.amazonaws.com/ravuxudibure/bayes_theorem_conditional_probability_examples.pdfIn PDF document text
- https://s3.amazonaws.com/pidufozu/which_is_best_wing_chun_or_taekwondo.pdfIn PDF document text
- https://s3.amazonaws.com/jimugivos/naruto_shippuden_volume_117_cz.pdfIn PDF document text
- https://s3.amazonaws.com/rezugekolaba/goodtables_python_validation.pdfIn PDF document text
- https://s3.amazonaws.com/metakibeme/31079776174.pdfIn PDF document text
- https://s3.amazonaws.com/tazopaju/gomejarotepewupoxum.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00010157.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10157	5160 bytes
SHA-256: `01114f694b810dfac1ad28dac8a5fc3045c3e039808135349ae93530b23ff473`
`font_01_sfnt_off0001130b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1130B	11312 bytes
SHA-256: `138bbf77f3fe2710ed376f056360838655becd7cce29a7fd2872d4f69bf606a0`

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