Malicious PDF — malware analysis report

Static analysis result for SHA-256 5876ff07100be6f8…

MALICIOUS

PDF

71.4 KB Created: 2020-11-20 23:06:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 37920ff2e9609204ffcadcceb8be6c4b SHA-1: dee4fbf761f6f0dd439368166d2a430cc23829cf SHA-256: 5876ff07100be6f8b76e41b3147a3a58bd20c629856dc3be111ab1a9728582e0
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to 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
  • 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/123?utm_term=bully+game+geography+class+4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f8cccb69fec6.pdfIn PDF document text
    • https://fanamavikere.weebly.com/uploads/1/3/4/6/134610997/9f469e1ae117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5fa8a3ac6b4a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f901bad9832a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5f91a79c8ac4a.pdfIn PDF document text
    • https://dagevonedil.weebly.com/uploads/1/3/4/7/134736192/palufugavomadez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5fa16ffd8cca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468259/normal_5fa39e6f4a7b7.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/dorulusof/medical_attendance_certificate_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6945417a-dc5d-4cb8-9a2e-f3f00451a217/modiwuxigazobe.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/english_courses_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0fbcbb2-654e-4d75-9b39-eeb8ae09d425/4947047363.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_off0000cbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAB 5232 bytes
SHA-256: c2784636a1858253deb3cb201dabc4e9943e534ee766aa52e4cc0be6841529ae
font_01_sfnt_off0000dd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD82 10832 bytes
SHA-256: e4a909a239082558bef97a16f54c1d3221b8d1678d237a83d0237ecbb3714eab
font_02_sfnt_off00010280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10280 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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