Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d273f51ca155090…

MALICIOUS

PDF

78.4 KB Created: 2021-04-06 19:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8a739a0f4b25e324f1baab8e87f7b79a SHA-1: 95595604aa6ff2ae6179adfe496f3b35520e0629 SHA-256: 6d273f51ca155090acbed76fca0ca57db8910a678d8a422d8eab0d2557650cce
156 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically requesting recovery secrets or private keys. It also embeds external URIs, one of which is a suspicious URL that could lead to further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or credential harvesting.

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://jottigo.ru/wix?keyword=docker+compose+book+pdf PDF link annotation
    • http://jidameke.mypressonline.com/93398603359.pdfIn PDF document text
    • http://xazupadapafow.mypressonline.com/4003880282.pdfIn PDF document text
    • http://poverkavoda.website/negixonnhsof.pdfIn PDF document text
    • http://vevovifox.scienceontheweb.net/ejercicios_de_angulos_entre_paralelas_para_secundaria.pdfIn PDF document text
    • http://good-production20.site/takutofofidinaxejukmxefc.pdfIn PDF document text
    • http://allieshouseofhope.com/27385843934qogc0.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/3083591163460v70.pdfIn PDF document text
    • https://$request_uriIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bugutaj/substituting_variables_in_equations_worksheets.pdfIn PDF document text
    • http://zalatikewal.atwebpages.com/89832795709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6f751b-e1d6-48a3-ad04-5e9b9cd02be4/xivodofegisal.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/breville_coffee_grinder_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/jufasuza.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/how_do_i_reset_my_plantronics_backbeat_fit_headphones.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/what_is_the_climate_like_in_portugal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a972cbd-7e06-4ffd-bed1-32bcd4a364b3/19359807311.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/when_you_wish_upon_a_star_piano_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/13895843894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed85c24e-5950-4313-9af2-f4f6e02e94a3/pijuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07d347df-1cef-4b5a-8340-0a8887c538c2/43881898225.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/excelsior_college_registrar_phone_number.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_off0000f46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46B 5260 bytes
SHA-256: 8d061cdf12b5b30aef2711fbcdc5d0f3fc1b6e8ab367f123a39f0bd56b3640e0
font_01_sfnt_off00010640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10640 11200 bytes
SHA-256: 6fa2d98667519e184c555a04c5020c3b7b3329e556a11888baa441cbfa31ff90

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