Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb517cd7997fa46…

MALICIOUS

PDF

68.6 KB Created: 2020-11-14 20:03:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 86ad1081824ded69c714c6e18cf44dcd SHA-1: 73a9022a9fa86ee13dc22ff72a52f62ca220ddab SHA-256: cdb517cd7997fa46f06250b1655b658400b19d290f19961591b9ca4ec274fbcf
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malicious link farm. It contains numerous external URLs, with one prominent URL pointing to 'traffnew.ru', suggesting an attempt to redirect users to potentially harmful content. The presence of a PDF_SEO_LINK_FARM heuristic further supports the conclusion that the document is designed to host or link to a large number of external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://traffnew.ru/strik?utm_term=cell+transport+mechanisms+and+permeability PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402963/normal_5f9a983da37fc.pdfIn PDF document text
    • https://mifanalukuzesu.weebly.com/uploads/1/3/4/6/134688284/dafigajukemil-pivizutabukep-timizir-fumete.pdfIn PDF document text
    • https://miperodijazef.weebly.com/uploads/1/3/4/3/134308013/fomufadulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424036/normal_5fa14fe6dcb1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_5fa5e23461974.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/vawinubovil-tiwikemubu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tenunud/mufoved.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/open_houses_lexington_ky.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/antimanual_de_filosofa_de_michel_onfray.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/95389164054.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/sly_cooper_collection_ps3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC482 5364 bytes
SHA-256: 8ea1dc618801be0a13f6491b70659117a51e02c89397dbf11036bcb0b45e536a
font_01_sfnt_off0000d680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD680 9708 bytes
SHA-256: 0a2c0c6baf4da3b1b6beb21a56908877cfb8bbd5db5413d6b83622d112bee0e4
font_02_sfnt_off0000f7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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