Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f46d2771ce23c08…

MALICIOUS

PDF

72.5 KB Created: 2021-01-08 18:13:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 50a04a4db04f3bc840d507a93f0806c7 SHA-1: 9839e887082f48998e1eb402a3185eb948d133c7 SHA-256: 0f46d2771ce23c089c6945d97647ece61d5ff3578d943cbebdf100476015503b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, with the primary redirector URL pointing to known malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=chota+chota+nanayuthu+female+video+song In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f8f6824c6944.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416501/normal_5fe10c7ff06a6.pdfIn PDF document text
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/nibadetujexufe_defufemuke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5f9af427b7c08.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/519516.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472186/normal_5fe0294c3bd99.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/1310432.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/fadedosi/57499893989.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/zudugegufopuvorumujul.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/rikoje.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/kadirexajejak.pdfIn PDF document text
    • https://s3.amazonaws.com/tosasugokod/4768756939.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_off0000dca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA4 5408 bytes
SHA-256: 42854d0052be34915a7beb4c269b7ae1996c0f647f0d56d4f77e3791b99e37ff
font_01_sfnt_off0000eef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF4 11408 bytes
SHA-256: c5b5511d7d30e6bcc7b7b888dc03134643bb0994c0b99b317c11aeea2076188e

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