Malicious PDF — malware analysis report

Static analysis result for SHA-256 9065543e5437d0a9…

MALICIOUS

PDF

89.9 KB Created: 2021-01-02 10:43:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 77ed85fa1df1afe17aa2fd0f1a8a1f05 SHA-1: 797900b936e9a4584b36a7be9d5d2a3a9cde483e SHA-256: 9065543e5437d0a972299f3b83f369e5106930d5742e5e4456c256b4620e3d95
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or phishing attempt. The presence of embedded URLs and the overall structure strongly indicate an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

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/123?utm_term=codigo+penal+venezolano+vigente+2011 PDF link annotation
    • https://bidutujube.weebly.com/uploads/1/3/4/4/134403342/mizapawulovigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453103/normal_5fa25f8b6177d.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/fcd7ba93a0cb62.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9374f0a-bbe0-407a-b124-c48ca70e1e60/68673274454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a8a5d1-0f13-4129-9301-f2261e28cd54/vipifuvopozul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad290cc5-400c-4d6f-ae76-031071ec5e42/japixixazigujunam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c0b53be-f19f-4a7e-bb03-ecbc74df05e1/55503017911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d1edf34-2b4f-4cf3-9221-18aeaba80ccd/74861153997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f1db83-e19f-4b12-b4b9-fc819ef005b9/60531003913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3915eb1e-bb8c-4b1f-a297-6b670ab59071/60606594980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39b36be8-b2cf-473b-9ac1-d3054c2c4558/39256232421.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_off000123bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BD 5192 bytes
SHA-256: 67a56aa8e9b03108e5c4ed19fa316f33ffe4e3fc3a4e0ec2c42d6da8e6094ab0
font_01_sfnt_off00013590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13590 10936 bytes
SHA-256: 26ecc1c77819ded48796b20022f03f637a31200f4f1e886002d329cd27565a41

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