Malicious PDF — malware analysis report

Static analysis result for SHA-256 59bb6a97d311821b…

MALICIOUS

PDF

81.2 KB Created: 2021-02-11 20:35:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4b59f7816e87d0af65b368fc02c822d7 SHA-1: 94f3cde504a8fb4eab33e21d66270cf734d113dd SHA-256: 59bb6a97d311821b73448bcefcba9bcafb26194b02475222d77877cc582cfbd9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and S3-hosted PDFs, suggesting a link farm designed to attract traffic or distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/123?utm_term=spider+man+far+from+home+full+movie+download+netflix PDF link annotation
    • https://jokiputukalak.weebly.com/uploads/1/3/1/1/131164130/lorumaba_ledabokul.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/benuxivobin_xolotu_fifawamukajegu_mowerenure.pdfIn PDF document text
    • https://vuxamirajuka.weebly.com/uploads/1/3/6/0/136082549/7a08821d7c0e37.pdfIn PDF document text
    • https://nizevamil.weebly.com/uploads/1/3/2/8/132814567/668131.pdfIn PDF document text
    • http://crubr.space/surufutejatopuxuwidu56v87.pdfIn PDF document text
    • http://devlp.club/hip_arthroscopy_portalsmglwa.pdfIn PDF document text
    • http://cyberlife.store/kaloxofxltk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pojoxonofed.rf.gd/vesazuwosumom.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/rivoxotamomakulijeg.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/67262674625.pdfIn PDF document text
    • http://roduteberilexel.epizy.com/nursery_rhymes_english_video.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/94034848108.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/circular_flow_of_economic_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/44937421829.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/difference_between_meningitis_and_encephalitis.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/83696596585.pdfIn PDF document text
    • http://gafejufojivu.epizy.com/tikasupodaro.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/69106013851.pdfIn PDF document text
    • http://momubitirukoj.rf.gd/retention_money_guarantee_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/96698593293.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/53130284467.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/sovizozumurugejomif.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_off0000fef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF1 5424 bytes
SHA-256: eaf783ff5236d87b0e05ab90cc401f1f6a0938c48c8c463c1d70eab218cf5537
font_01_sfnt_off00011154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11154 11132 bytes
SHA-256: 93b641a276de3688c36b8ba6004dadc513619713e0d3f7e9abc5f7d7aceda113

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