Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad33822828c546c…

MALICIOUS

PDF

75.7 KB Created: 2021-03-18 17:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bd90ce816ac1bf504af4fcd690f29e5 SHA-1: d1a3601b728777eb6b0e306ced1acd5445ae01af SHA-256: 9ad33822828c546c31d7bdeb2bc9d78b62167542ab8c4a3e06df632e59c37b5b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to improve search engine rankings. The document's content, presented as a 'Sony car stereo operating manual', is a lure to direct users to these malicious URLs. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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.
  • 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://kuzutuzo.ru/wix?keyword=sony+car+stereo+operating+manual
    • https://dovenokitumenu.weebly.com/uploads/1/3/1/4/131482991/wofizef.pdf
    • https://cdn-cms.f-static.net/uploads/4374009/normal_602428c44971c.pdf
    • http://lizixute.iblogger.org/28411042469.pdf
    • https://static.s123-cdn-static.com/uploads/4425760/normal_5fcd65be0da33.pdf
    • http://jofarofuwudeveb.66ghz.com/75345110984.pdf
    • https://wilulesutazi.weebly.com/uploads/1/3/3/9/133997377/dawobopo-fuxefelajipim-gugam-nerew.pdf
    • http://jukojadijomefar.medianewsonline.com/how_do_i_fix_gm_instrument_cluster.pdf
    • https://cdn-cms.f-static.net/uploads/4464078/normal_604f3a2d76d09.pdf
    • http://fowagovujag.22web.org/kazipu.pdf
    • http://kavademive.sportsontheweb.net/wewat.pdf
    • https://static.s123-cdn-static.com/uploads/4452599/normal_5ffdc09e8fa88.pdf
    • http://vumajuzatijerak.getenjoyment.net/dekixujugerudujide.pdf
    • http://ligumexijigab.getenjoyment.net/lg_dual_inverter_ac_error_code_co.pdf
    • https://static.s123-cdn-static.com/uploads/4461250/normal_5ff15dc48570d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tawosutosuxi/atelier_tanaka_epub.pdf
    • https://s3.amazonaws.com/musokejixami/25066402231.pdf
    • https://s3.amazonaws.com/faduxodiwo/guide_wall_for_diaphragm_wall.pdf
    • https://s3.amazonaws.com/zomuzigo/abbyy_finereader_9._0_sprint.pdf
    • https://s3.amazonaws.com/davawina/aci_detailing_manual_2020_free_download.pdf
    • https://s3.amazonaws.com/muvemasoxaji/31303177436.pdf
    • http://fepasike.epizy.com/90791617154.pdf
    • https://s3.amazonaws.com/pibajuwi/weathering_with_you_eng_subtitle.pdf
    • https://s3.amazonaws.com/xakapudakadu/matlab_scatter_plot_colorbar.pdf
    • http://bujuxuvumelijet.epizy.com/xikifoxo.pdf
    • https://s3.amazonaws.com/jasadavebaga/nys_insurance_assignment_of_benefits_form.pdf
    • https://s3.amazonaws.com/babetafaperaxov/komobupuso.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ce.bin
a658245f6bf27480b11f770cc208e39e37e78ee26e46166c35dc9355e36328d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CE 5456 bytes
font_01_sfnt_off0000fb55.bin
3dc44ef691033bf868ed3a0083a1cb53e89ec2fdb503e84f99ae9ee66b58f3b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB55 11416 bytes

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