Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5e96273974fa33…

MALICIOUS

PDF

72.9 KB Created: 2021-01-12 18:10:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8379082c9e01f4f1fcfdaff75023d4d1 SHA-1: 9bc7a1b92cc449c8f7a024237182a3c38ed31625 SHA-256: 2b5e96273974fa33952028688a5fc8e96a94c9eaf3b9de43e71cea169a035365
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a coordinated effort to manipulate search results or distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or redirection tool.

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://cctraff.ru/aws?utm_term=ice+cap+zone+sheet+music In PDF document text
    • https://site-1176519.mozfiles.com/files/1176519/73793018564.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lafomu-fowesutom-dabikituduxun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5fdac4212693d.pdfIn PDF document text
    • https://cdn.sqhk.co/wibepudib/jjDhagg/59843072075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5f9ba8140204f.pdfIn PDF document text
    • https://site-1172123.mozfiles.com/files/1172123/earthquake_san_diego_area.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/boxalewijim/free_channels_tv_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/get_perspective_transform_opencv_c.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/gaguze.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/ximesufotedepu.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/apc_smart-_ups_750va_lcd_230v_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/tobivovitupak.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/preschool_art_curriculum.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_off0000dd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD15 5032 bytes
SHA-256: 9a4282705376dc83dbe39508477be7f67d942f26929298e1c699001487ebaaf6
font_01_sfnt_off0000ee16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE16 12212 bytes
SHA-256: c6f6e2471cb39d9ac58560b78f091131aecb0cc883ef0ed917fd79de464a4a3a

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