Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d1a8a8a490a0d4a…

MALICIOUS

PDF

69.4 KB Created: 2020-11-24 19:01:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1923cbe90ebfd8a911dfd4e15d01dcc7 SHA-1: 50bdfef041196ceab4aa202c403f2c2b672dcaad SHA-256: 7d1a8a8a490a0d4ade2908bc8ac14061ffeee8dea0c970402493512870b76bf9
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded links, such as 'https://ggtraff.ru/123?utm_term=list+of+highland+climate+regions', strongly suggest an attempt to direct users to malicious or spam content. The presence of numerous PDF links indicates a potential SEO manipulation or phishing campaign.

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
  • 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://ggtraff.ru/123?utm_term=list+of+highland+climate+regions In PDF document text
    • https://pezitojuxesuvog.weebly.com/uploads/1/3/4/6/134608136/e8c912f0.pdfIn PDF document text
    • https://rajivuwos.weebly.com/uploads/1/3/4/3/134398668/pukum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490370/normal_5fb2f6737f7e1.pdfIn PDF document text
    • https://kafedujewerom.weebly.com/uploads/1/3/4/6/134622586/nufadife_zurigapavudafas.pdfIn PDF document text
    • https://guvisine.weebly.com/uploads/1/3/4/5/134598756/satevanikinev_gozebomasetud_vixijawijaxugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_5fb3e0d9ecdd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388157/normal_5fa65076dd9a9.pdfIn PDF document text
    • https://jivoxafur.weebly.com/uploads/1/3/4/3/134382284/fifelituwasev.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/de34da746bca958.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/86e61.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/wujafivabipo/aula_internacional_1_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/dr._marian_flores_manankil.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/91137234153.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/4995153538.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/bilal_saeed_songs_all_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c9e347-621c-4843-88e9-22cbb93d2003/dogs_with_brown_noses.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_off0000d03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03D 5376 bytes
SHA-256: e19530049e7f4158990ee94791bbcc28ecba3d43661caf31603cc0d5891ab797
font_01_sfnt_off0000e262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE262 10736 bytes
SHA-256: 81ce19c49b5a0ec9641d4ea2f0ec98643f148c705faa3c96a244f0282a5e7428

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