Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7bb9b883ae58fe…

MALICIOUS

PDF

80.0 KB Created: 2021-04-27 00:35:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 01ffc884156f57f2e2ed331ea7e672b5 SHA-1: 21d9ff6243de7dcb8cc598ef0d3cbf7209964d1d SHA-256: be7bb9b883ae58fe72bfbc2337270b9512215d3d71f2ddf60a6ba305d162baaa
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure related to accessing a Vizio TV menu, which redirects to a suspicious URL. Heuristics indicate this is a phishing attempt, and the ML classifier strongly supports this assessment. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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+access+menu+on+vizio+tv+without+remote PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372358/normal_606259ac920ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369769/normal_5fce6fe790b98.pdfIn PDF document text
    • http://yognat.space/52674999368p7ri0.pdfIn PDF document text
    • http://ig-objectionform.com/23503071988ellye.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://uploads.strikinglycdn.com/files/41044081-0104-41ca-8952-ab4353308409/83145134577.pdfIn PDF document text
    • http://fixemarugebi.rf.gd/26022704187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8926fd9b-1017-47d6-9606-50cf72379cdb/5844486635.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/partnership_deed_in_marathi_format.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/la_casa_de_los_espiritus_personajes.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/transformers_movie_all_decepticons.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/examiners_report_2019_edexcel.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/setll_reade_in_free_format_rpgle.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/deductive_and_inductive_reasoning_worksheet_with_answers.pdfIn PDF document text
    • http://tejutixofefadi.rf.gd/livros_aprender_frances.pdfIn PDF document text
    • http://kepisuv.epizy.com/ultrasound_beamforming_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d57b66b-ebfd-48b2-9637-6a53552c03af/41429830747.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_off0000efa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA7 5052 bytes
SHA-256: 3c9eea6da3e924c762ac6dd81659d10a95abbdcb13f1b9e648fee5d93cd7680a
font_01_sfnt_off000100b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B7 10452 bytes
SHA-256: 9ff83c656f284d219d9215a03672b234ff23aebb17806afa6a7ba325078994cc
font_02_sfnt_off00012494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12494 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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