Malicious PDF — malware analysis report

Static analysis result for SHA-256 52d0767a8c7f5ed6…

MALICIOUS

PDF

65.1 KB Created: 2020-11-18 15:10:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5515146b979f3815dd54e0d9dcf4657e SHA-1: 650f65ae43909570b01ab12334d118df4ee4faf9 SHA-256: 52d0767a8c7f5ed614c4f975247d0e8e0eba50fa5903955a4c8db6863579f298
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to 'traffset.ru', suggesting a phishing or malicious redirection attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are hosted on S3 buckets, further supporting the idea of a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing.

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://traffset.ru/aws?utm_term=blutv+%25C3%25BCyelik+iptal+formu PDF link annotation
    • https://xomivevisavuwog.weebly.com/uploads/1/3/4/8/134852088/jexawolaxonoju.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/7e7a39.pdfIn PDF document text
    • https://nujuwededewomoj.weebly.com/uploads/1/3/4/3/134305400/bozapijipuv.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/dojivewobasuval/94584092563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d723f501-d3d5-42a1-b931-b0010e13028c/73185426615.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/14919832692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/742e09b9-6313-477c-ab02-70acdb0abf0b/lopidupefesoliro.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/18421197121.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/bloons_td_5_guide_hard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee6a8798-cf45-4c25-81e9-ee781835b6d6/89424073453.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/january_2020_tamil_daily_sheet_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/41151549076.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_off0000c04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC04E 5264 bytes
SHA-256: f52e38ca88eb3521d2626375841f0180eb0bc82941ad257438331435d027f0c7
font_01_sfnt_off0000d207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD207 11144 bytes
SHA-256: 9e6d23808e4f5576b07d0cb0318f08b5029483324c3d46e50a11c3a0efccf9b6

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