Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00ccecf83bd2502…

MALICIOUS

PDF

82.5 KB Created: 2021-09-17 14:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 258f9854ce0fdf3a3d1c477d2ec34bdb SHA-1: db21a54f18d5da36af1575a135356e72783ceeac SHA-256: b00ccecf83bd2502fbff7a6ba95f24e8bc666d7c64bd016334aa606db2acbe73
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to PDF files hosted on various domains, suggesting a link farm or content distribution network. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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 http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/salefepaxakuka.pdf In PDF document text
    • http://scandinavia-ex.com/images/blog/file/74169839699.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/zutiwisoxupobawago.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/89520812718.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/57222019173.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29506127790.pdfIn PDF document text
    • http://85560891.com/upfolder/e/files/20210902180302.pdfIn PDF document text
    • http://proximeo.com/ckfinder/userfiles/files/napasumuzido.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/97086366311.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/83867119687.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/kurazojesawiduxixiduluvat.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/92447206988.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/58945581514.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/65577756353.pdfIn PDF document text
    • http://ccadl.com/files/20210904222608.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/15993343016.pdfIn PDF document text
    • https://congchung7.com/upload/file/28011585287.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/nejopilanamavugasumekoj.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/solokejun.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/55187294759.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/42900582855.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/13117690811.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396a73d42f0---9449174.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=best+mobile+review+site+in+indiaPDF link annotation
    • 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_off0000db96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB96 10752 bytes
SHA-256: 946a4624d2c157cf7426ac50a9a3f4057b5a1daa0650c90794820171a268cfa2
font_01_sfnt_off0000f461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF461 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C73 18492 bytes
SHA-256: 9bb045e62754e8a117de21101e460d1ea0a8269fd52a0483241b10eadd888681

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