Malicious PDF — malware analysis report

Static analysis result for SHA-256 268bc22e393f98a9…

MALICIOUS

PDF

69.9 KB Created: 2020-11-13 22:16:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: dea72eb024b3c735699fdcd619962ca3 SHA-1: d0b51b0e3cbd0fadc6bd99e1bdf15ccd0dd72fc3 SHA-256: 268bc22e393f98a9eaf646408a300010acd6a367970340976f9e99cbbe56ca1b
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external PDF links suggests a link farm or SEO abuse tactic, likely to funnel traffic to malicious sites.

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://gettraff.ru/123?utm_term=star+wars+the+force+unleashed+1+all+bosses In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5f8bc1a889685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410006/normal_5f9c6f3718fa3.pdfIn PDF document text
    • https://mafupixalikufu.weebly.com/uploads/1/3/4/6/134662523/6660083.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/e8631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f9d8fac8211f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426810/normal_5faed4482718c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f99b2a9165e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392650/normal_5fa977de2aaef.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/9e177b1d-3e4b-471b-907a-4d530c0f5a31/mebozadijuvinafizovek.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/cmx_theater_burnsville_mn.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/61524453246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55db5fed-fb8e-4bea-8e55-726440a50af2/92186475857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d63134c-eb92-4eef-94ec-d7aff7c84a3a/69428416268.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_off0000d3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B0 5496 bytes
SHA-256: a4865855d865bd977b8afe5d2b68b1ec7e87279c54e984536894f19e85ca5982
font_01_sfnt_off0000e66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66F 10760 bytes
SHA-256: 347823c49e6cc289cf618f96c079c615d895847e066de62c3b382aae127ee792

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