Malicious PDF — malware analysis report

Static analysis result for SHA-256 44982afbe83d34f2…

MALICIOUS

PDF

72.6 KB Created: 2021-03-01 11:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f221ddb7beeb933c56e133a341131706 SHA-1: 4a1bb82f680c71b3d5a78ffbec0fffc8e2980a70 SHA-256: 44982afbe83d34f216dd5447c1244e8d37dce309ecc4d4c36daff94c328a4ebf
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI that directs users to a URL related to stimulus checks, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a phishing lure, likely designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/strik?utm_term=how+to+file+simple+tax+return+for+stimulus+check PDF link annotation
    • https://cdn.sqhk.co/nawiwola/fjiChev/cosmos_movie_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/jfnj3ie/98667524344.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/jGBjUja/senafisuxanonoloja.pdfIn PDF document text
    • http://salet.store/true_north_academy_football0zuxq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494136/normal_5fd8b08c4c42a.pdfIn PDF document text
    • http://itravelimpressions.com/android_arsenal_viewer3rro9.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/KiiK3ZV/groundwork_metaphysics_of_morals.pdfIn PDF document text
    • http://gutprod.xyz/the_book_of_enoch_mysteriesymaap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_6018bd16235dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_5fd62810bf980.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/kKjd4hd/93330764192.pdfIn PDF document text
    • https://cdn.sqhk.co/kigakikijebo/did4Hja/midupaxonij.pdfIn PDF document text
    • https://cdn.sqhk.co/bogijifaviba/mzngd6R/25022138277.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461744/normal_6010c511c1f06.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/doxifuba/43319378302.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/49015877483.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/dipikiju.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_off0000df67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF67 5440 bytes
SHA-256: b3a31f348b8e8bf0302e2e51e7e0251606245e934774f2d5607b0fd40038d976
font_01_sfnt_off0000f1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D2 10348 bytes
SHA-256: c7fcac2dbb77cd15bc602cd236993df01f49958f4ae19321bbb32dc71f2a9433

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