Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6a04a6651dee5b…

MALICIOUS

PDF

68.4 KB Created: 2020-12-16 09:48:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a46bc31bae24e21f7bf764b1acd9f457 SHA-1: 3c77d3e4b42d88d33e87b6333ef6863b825f1036 SHA-256: ee6a04a6651dee5b4460c54c5b6b4671c1ae73c86abfdf96db1c5dd45fee0ca8
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest a link farm or SEO manipulation tactic to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=memory+foam+mattress+full+size+8+inch In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_5f8c14582b76b.pdfIn PDF document text
    • https://tixosagekade.weebly.com/uploads/1/3/4/4/134489061/dapamipakukibelid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454438/normal_5fbe9cccd2715.pdfIn PDF document text
    • https://wabebapag.weebly.com/uploads/1/3/4/3/134335427/6540822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470380/normal_5fc1520a17fae.pdfIn PDF document text
    • https://wedezetepeb.weebly.com/uploads/1/3/4/5/134528952/wafeginigejexamowapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426686/normal_5fad739d14c03.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/4548191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387718/normal_5f9be74045db2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404987/normal_5fba707f45c97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453327/normal_5fc0c2de56a87.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/gelawiweza/duvuxevitiwinebotunida.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_off0000ce14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE14 5472 bytes
SHA-256: 40dbbd25d03f1a56629bb5eae59b1c816f719f607ce2040a77c695f89434b132
font_01_sfnt_off0000e09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09F 10712 bytes
SHA-256: 4222e4c1f73ad3338f42bba9ee71316023b9637978ce178af925101ce27c3899

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