Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcf37ed0cb2b0ff4…

MALICIOUS

PDF

69.3 KB Created: 2020-12-23 02:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 665c09a0619d3aa3c90fa44a1d13ca8e SHA-1: 73a390abf3f66c732091b56654c1ab04662c25d7 SHA-256: dcf37ed0cb2b0ff45105e1ba92e5e24e62d36ec9aff54150863a5beed71fa8d5
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of embedded URLs and the heuristic firings suggest this document is designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/strik?utm_term=sisters+oregon+fire In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5fd37ab29ed97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473954/normal_5fd91b0918634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461481/normal_5fafb54d0f280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408997/normal_5f95f1ea266e2.pdfIn PDF document text
    • https://tojalalegeb.weebly.com/uploads/1/3/4/5/134584715/f40d58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401692/normal_5fcbf80326327.pdfIn PDF document text
    • https://wepusiviji.weebly.com/uploads/1/3/4/6/134661614/5ef4e599e667.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://uploads.strikinglycdn.com/files/3c7da4ab-b8eb-4106-b2bc-12bc618c3037/43028817313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457c74cb-1e02-4669-aefb-d4f609652f55/31306186623.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfbd564be903ae6404710/1606220760468/83715620386.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/bujusuvitogukopugaf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5326c68612547ed7a0b58/t/5fc961ab93b4dc627b527979/1607033260600/college_football_live_scores_espn.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/bivixonafozorusuxu.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_off0000c923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC923 4584 bytes
SHA-256: f0b9866b13521873708ef15d8dee70243a534864f8f08d62be776bcaa9bebc35
font_01_sfnt_off0000d8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B9 9876 bytes
SHA-256: 6dbf1497880e4f3ca06d4032f56dd421570f3497dca79f8e3330563974eb8343
font_02_sfnt_off0000fa86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA86 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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