Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa116c75db25aff…

MALICIOUS

PDF

61.1 KB Created: 2020-11-13 22:20:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9410e9c81b3e1f720d4c7dbb311dc5d9 SHA-1: ded80cc0eddbabdb093c558818ef54a3be1458d2 SHA-256: 0aa116c75db25aff2f92c36b23a210ce6651afd3c135a5285a3c58bf96526dc6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/123?utm_term=i+love+pho+lubbock PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393180/normal_5fa5dea01fa92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f873cb87a071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417644/normal_5fae7333018eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_5f8d3ccd706d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f9ba06574938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5f9e23ba9279b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380869/normal_5f950fefbf0e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5fa30e80afdd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5faa360d3bf31.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/b31bc455.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/jeponowon/62289396659.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/blind_flange_dimensions_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b95ca6f2-68cb-4726-bb0e-1aed6dbd2770/isobars_and_isotherms_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/949997bf-b93a-4f74-9306-b53986487d81/40118369742.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC3 4736 bytes
SHA-256: dd599880be35a5609533a33e58292cb95c3af16e5d2fafd8b09cf7d10f87e600
font_01_sfnt_off0000bae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE1 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0000c644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC644 9860 bytes
SHA-256: 44e3e148b75dd919281a0c36d2ea294a609880f65ab1bae0d69265c22896b129

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