Malicious PDF — malware analysis report

Static analysis result for SHA-256 2097eddc7b532b8b…

MALICIOUS

PDF

85.0 KB Created: 2020-12-30 00:43:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 431f8db1ba467ad03426d2973d65ac7b SHA-1: 506b0bde401c6a3f3fb08dc6881a6d4a332b01df SHA-256: 2097eddc7b532b8bdf5da24ee7ac3305e932b0a218cfad01aabd76e36486843e
156 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 external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs points towards an attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=ngl+arena+football+salary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388285/normal_5f988e87155d4.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/9jhjfja/37066643471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426686/normal_5fbf61a1d684a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5fe86bdf15b28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_5fe65185a51c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407788/normal_5fa8f72f8106c.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/3ibggha/ataraxia_definition_wikipedia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f893a8c98e10.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/5761154.pdfIn PDF document text
    • https://woxukobu.weebly.com/uploads/1/3/4/3/134392577/vanilevikex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488323/normal_5fda8fc3e9ead.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/dinilederu/bafotiwasimusuteweve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2081b96e-310c-4034-94cf-1f8a6317a910/fraction_project_for_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/hampton_bay_antigua_ceiling_fan_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b04fc96e-674d-491b-bc92-c755b7ef386e/june_2016_algebra_1_regents_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e415648-3f70-4cb5-a47e-e6bdb54a03a6/pilukimeweturagelonot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/669b9ac9-af68-4194-8b3e-cb9eaec923e6/flying_mounts_pixelmon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35315550-a303-4241-a1f0-85af7939a2f8/futekewix.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF284 5148 bytes
SHA-256: d19a7c41c91d1d6173f1111d56356ea6c7fc4aaf4c307c31bc626f24a0be4f1b
font_01_sfnt_off00010429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10429 11960 bytes
SHA-256: 5d31bdc4b8187873ad0486fabc8d937fccdafcf86d862dab6b7bccea343ec1b3
font_02_sfnt_off00012b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5A 18044 bytes
SHA-256: 1ef41d112490a5dc297eaac9e5a1662aa8abb546b78b6dde40b7fbcb78d9a25f

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