Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0982671bcfbaa74…

MALICIOUS

PDF

68.5 KB Created: 2021-09-15 05:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a42810838f42f7f31beb28ec5381de96 SHA-1: 39ad7f768886dcebd5105d26ff87564657763555 SHA-256: d0982671bcfbaa74c6b1dd30a474526cf31b0ed44b5b9443b7185a8ef935c818
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to disposable domains or redirectors, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity, likely leading to a second-stage download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://krisoc.ru/uplcv?utm_term=words+with+start+with+v PDF link annotation
    • http://visit-pune.com/userfiles/file/porakamosesifalos.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/jotetawupuveba.pdfIn PDF document text
    • http://shouce-image.kuchuancdn.com/Public/resource/files/48222612152.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/befujab.pdfIn PDF document text
    • http://orenprom.com/img/account/file/52867714362.pdfIn PDF document text
    • http://yas-center.ru/userfiles/file/guguvujigelewokata.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136656ca5c73---xiwavevujoveluzilesiwura.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/861dc30da4114ae5519e8d90a24b79fd/20061217976.pdfIn PDF document text
    • https://mimpiindah88.com/contents/files/966476157.pdfIn PDF document text
    • http://bbhshipyard.com/userfiles/file/vedefelodokekig.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210909105145801.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/12906394813.pdfIn PDF document text
    • http://limoride.net/gallery/file/80591419990.pdfIn PDF document text
    • http://medeeatour.ro/mm/file/xufolifupo.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/47849631297.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/dadurawaxi.pdfIn PDF document text
    • http://apex-architect.ru/images/file/9521645747.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/8867840815.pdfIn PDF document text
    • http://infinity8talents.com/userfiles/file/vemifuwarezivinevusegap.pdfIn PDF document text
    • http://phupmirpol.pl/userfiles/file/94616456758.pdfIn PDF document text
    • http://mapect.com/upload/fckeditor/file/durolukumaziputowokufuja.pdfIn PDF document text
    • http://noithatmyhome.com/img/files/mufuxemufum.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE98 15520 bytes
SHA-256: 73b8d003a27c03a23703c2e26d0d5ec803c0845e673f83cd9ad7ae9d693841a4
font_01_sfnt_off0000d5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D2 10208 bytes
SHA-256: fd5044a986ffa2e314e7ea307fbd8ec44b46dc84527b4c0e0dcb1a9fee1564c1
font_02_sfnt_off0000ece3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.