Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62e000ebd0d599c…

MALICIOUS

PDF

34.9 KB Created: 2020-11-07 21:50:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 948dbeeba39bea4f067393111d5890ff SHA-1: d183452626f8d5a66f14b52b905977a77fbbc55c SHA-256: d62e000ebd0d599c92696fe5c1715b8232c4f327f6db02ec20a5f1d9018c2861
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffmen.ru/aws?keyword=100+common+verbs+in+english In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425504/normal_5fa6d1f998d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f870cecac0b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404308/normal_5fa080a221be2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412164/normal_5f9c90829e00d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_5f9579809bc35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414866/normal_5f94770b864fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413369/normal_5fa1abd6daf34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_5f9192b31a717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409798/normal_5f93710e6478e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409250/normal_5f97e749ea2c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_5f9834aa7615d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sugosubexez/67635087271.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/qoosaa_afaan_oromoo.pdfIn PDF document text
    • https://nelavikix.files.wordpress.com/2020/11/57764860820.pdfIn PDF document text
    • https://livilixojef.files.wordpress.com/2020/11/17155869739.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/95254895749.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4224 5008 bytes
SHA-256: e12229d3dbd564ad416966af6b8b5bc0494158c5b44583e73bfaa4a1325e0895
font_01_sfnt_off000052ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52EA 8660 bytes
SHA-256: 66a0053e3cc22d8c892334c02e05b3e86d4cfad81cac7550d388eca974fa3608
font_02_sfnt_off00007093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7093 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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