Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9103382389cf3e…

MALICIOUS

PDF

67.5 KB Created: 2020-11-11 14:50:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 267e93e0a889d124a4875a2c7da7a26d SHA-1: e51bd837ec6aa026eccbbe8e1b828930ac2e56ea SHA-256: eb9103382389cf3ef90fe1c381b66f1313349492f1d8e365c32a0490816da7c5
214 Risk Score

Malware Insights

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

The PDF contains multiple links to external resources, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the nature of the heuristics suggest this PDF is designed to lure users to malicious sites, likely as part of a phishing campaign or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://ggtraff.ru/aws?utm_term=bigs+backyard+ultra+2020+results In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f880b8e0601f.pdfIn PDF document text
    • https://lupigufenof.weebly.com/uploads/1/3/4/5/134509144/9525114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476595/normal_5fab806d556dd.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/zeworibuzoza/bakeribikivegetewis.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/cherrypickers_guide_coins_online.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/vista_landscape_lighting_timer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ca49e3-b78a-4979-9cf1-30a46b7d5766/xotumumumoxivu.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/awk_and_sed_commands.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/english_2_eoc_study_guide_texas.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_off0000c67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67B 5736 bytes
SHA-256: 66c4bc6757bbd6466238855cae5bd2467b78524bf7f08b0ea7a9f546af653f4f
font_01_sfnt_off0000da21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA21 11712 bytes
SHA-256: be29f6c840d708799aee462b619e727bf6d24dd8f15327b95ca216b539da12d2

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