Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c069072b5700fa…

MALICIOUS

PDF

78.6 KB Created: 2021-05-19 23:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8c21de4971564059d20ce65641726afc SHA-1: 4606c4a719078d5b09ea4aae038a4405596b3ad0 SHA-256: e8c069072b5700fa4dccfb12b710fd622d91f2be8267cc778530d195111624a4
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely related to phishing or SEO spam.

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
  • 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://kuzutuzo.ru/strik?utm_term=doutrina+e+teologia+de+umbanda+sagrada+rubens+saraceni+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485454/normal_600584d53c1cd.pdfIn PDF document text
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/8916579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393041/normal_603a02b220842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386591/normal_5fe95f3212c1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444884/normal_60293be18c63a.pdfIn PDF document text
    • https://dofolemabumef.weebly.com/uploads/1/3/4/4/134458616/nuwap-lunejako.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392873/normal_5ffa130cc3cdc.pdfIn PDF document text
    • https://lebilelumebik.weebly.com/uploads/1/3/1/6/131636833/zetikodupigotugina.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/wixanarer/essential_oils_doterra_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17cbb6c3-fef3-4c44-b2a2-44b9195da238/safety_1st_winnie_the_pooh_walker_height_adjustment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/552c1eaa-82ae-4dfd-857f-440e2cd21910/bebuxuvanono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a297b4e6-e16e-40ee-8be8-52a275109896/24836649900.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/judibudubavowavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3da4a57-c579-45b4-96be-b5da77a25b3a/kojuvobovazepejanufomapug.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/zuxikipovekofunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f39dbd6-3c16-42a0-82ab-17dcf149fce7/2020_poker_tournaments_las_vegas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a2e35b-30ed-4f54-84d1-a9ce4573dfe9/how_to_change_battery_of_thermometer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c7b5b48-24e8-4e20-a139-faf3cdb435e5/farmer_boy_ag_myerstown.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/18192780327.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/bombay_movie_songs_ringtones_free.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_off0000f2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A4 5612 bytes
SHA-256: ff5502c70f6ff40be66119d1308a30c614d45b9eb8f1119fcae38752edcfc661
font_01_sfnt_off000105a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A5 13116 bytes
SHA-256: 920cfae6e9fdb79403931efdca7737d4f2aa37620b16bdf34db9d561455e13f5

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