Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff875a384bed8bb…

MALICIOUS

PDF

59.9 KB Created: 2020-11-22 03:17:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e097ddb23d52e767d9b90cf875a3d757 SHA-1: bc105cc790b008c391a6da6c9eb6f9f096d31685 SHA-256: 2ff875a384bed8bb677a873f33fa5b9ed5d7b8ae54e1e05c089ab08bc15eca51
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to lure the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=poulan+pro+weed+trimmer+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f8b45bca7da7.pdfIn PDF document text
    • https://zixatemanareku.weebly.com/uploads/1/3/4/4/134472678/wofuwiliteni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464722/normal_5fb58675acccf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378843/normal_5f961aeadfe3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418583/normal_5fa12a92df77f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f887a9f88762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5fb25ab1e1115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5fa2a8043a7ca.pdfIn PDF document text
    • https://bididanigatozum.weebly.com/uploads/1/3/4/3/134314142/kivolado.pdfIn PDF document text
    • https://gekilatati.weebly.com/uploads/1/3/4/3/134378061/653e63580e8d8a.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/tadovu/3294668104.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_off0000b14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB14B 5020 bytes
SHA-256: 5a083584a4c105bd562b135761405e3c90a7613fecc74261eb7f79090fe05d36
font_01_sfnt_off0000c25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC25A 9928 bytes
SHA-256: c947fb54736918050e17a8017c2bd1398315e25f7c91c6ced545a2af875d494b

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