Malicious PDF — malware analysis report

Static analysis result for SHA-256 7deafde2b1cf12de…

MALICIOUS

PDF

66.5 KB Created: 2020-11-26 02:05:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5bf6abdcdcb9944ee412a5e7561478c6 SHA-1: e5ea00075d5d24795c77d0cb4fc29304cab64c29 SHA-256: 7deafde2b1cf12de1347bbe5e4814146d960af245d07a0286e69b25f3e196e83
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, pointing to various domains. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML classifier score strongly suggests malicious intent. The embedded URLs are likely used to redirect users to phishing sites or to download additional malicious content.

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://trafficel.ru/strik?utm_term=ready+willing+and+able+to+work+unemployment PDF link annotation
    • https://bukusafirede.weebly.com/uploads/1/3/4/2/134266240/3289374.pdfIn PDF document text
    • https://xotiroxo.weebly.com/uploads/1/3/0/7/130776105/9378778.pdfIn PDF document text
    • https://jipunexekamu.weebly.com/uploads/1/3/4/5/134588935/wamij.pdfIn PDF document text
    • https://rixidagetowema.weebly.com/uploads/1/3/4/6/134612143/wokegojukawa-fivegapejowuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416787/normal_5fa0d9c76a211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8d039b3f47e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403681/normal_5f98957ae4234.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/79932408-93b2-438f-9a52-9b22046f6f45/ejemplo_de_cronograma_de_actividades_para_un_proyecto_de_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e953cea-df32-4837-a3ad-6515f3cd2a15/58567940496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880e2228-4404-431d-b0fc-50b2b57a9404/kubota_gr2100_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c801afd-ada5-4937-8e77-74b28f864bad/96054767756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d43140cb-fabe-4a4c-8dc6-2a4ae9a929ad/54188974331.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_off0000c772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC772 5504 bytes
SHA-256: 65ae3756458f4891acb67902c674390ef4490eb7c290c61f721dd2c06a67e8de
font_01_sfnt_off0000da3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3E 10228 bytes
SHA-256: 648d0c9a60ce2a1a485bfb25283dc0bd84e0c45fb08938e1072b1cd441e5bd36

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