Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72d3b3dffe31ccf…

MALICIOUS

PDF

64.7 KB Created: 2020-11-18 13:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6fae1d94c0f6ed6809d036dfc5d56d9f SHA-1: 1bf2802d7cce140535a4fd365215ede7ee7fb492 SHA-256: d72d3b3dffe31ccf433c6593ee0355cc939e06edf0b69db8b545bbc9fc823d94
222 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, including a critical finding for a PDF redirector to known malicious infrastructure. The ML classifier strongly flagged this sample, and ClamAV detected it as a phishing trojan. The embedded URLs suggest an attempt to direct users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=aliexpress+kenya+apk In PDF document text
    • https://gozivuwedigati.weebly.com/uploads/1/3/4/6/134612943/melisafudukarutuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444351/normal_5fafb46462763.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/b67a41d2-f1ca-468a-9d0c-303692d591e6/xitemexagitezivajuzal.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/central_and_southwest_asia_map_bodies_of_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dba11a39-607e-4cb8-a92a-193df77ae09c/14172962896.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/subway_map_rome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6570d451-4e8e-400a-b178-5248c3dcd79a/vidmate_free_for_pc_exe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d3a7514-5896-4b3d-8b1e-04c179db65dc/schaums_outline_of_calculus_download.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/dokulajupuwetude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebee4f5c-06f8-4278-993f-fb938893558c/kojewugivuzidux.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_off0000c053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC053 5036 bytes
SHA-256: d02257fe9277930a0310b00443b223499ccb74482d0a3b9d3949ee69546f6e53
font_01_sfnt_off0000d18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18E 10868 bytes
SHA-256: 62d58d82df31191bc12bad81b9cd039eb9fce422cf32f4dd97bd9758fd1c6ccd

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