Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec09cbe5d7dc7c39…

MALICIOUS

PDF

75.0 KB Created: 2021-03-20 06:16:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ca7195a3f13aef3a62c47f6db3c3e66a SHA-1: b2d570a8ec24467f1e3b6e773bb472c2a7828e1a SHA-256: ec09cbe5d7dc7c39048489da32e033f4a03397c6bda199655e0a6b366a1dcfcd
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by heuristics as PDF_URI and EMBEDDED_URL. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV specifically flagging it as Pdf.Phishing.Trojan. The embedded URL likely serves as a lure to a phishing or malware distribution site, aligning with a spearphishing attachment attack pattern. No scripts were extracted, but the presence of external links in a malicious PDF is a common technique for delivering further payloads or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=what+are+the+key+skills+for+project+management PDF link annotation
    • http://dosijefa.mypressonline.com/how_to_do_full_transmission_fluid_flush.pdfIn PDF document text
    • http://fuwenosod.iblogger.org/91266964754.pdfIn PDF document text
    • http://gujozulogisin.scienceontheweb.net/bisection_method_examples_with_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/wokowuvawuz/ibEgjfr/paycell_kart_haz_r_limit_ne_demek.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/information_technology_degree_online_reddit.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/career_path_cooking.pdfIn PDF document text
    • https://xukonupuzifig.weebly.com/uploads/1/3/4/6/134621954/dupumofewax.pdfIn PDF document text
    • https://cdn.sqhk.co/wukiratuxazo/iigi3gg/lotiroridagumizesumaw.pdfIn PDF document text
    • http://gigogon.22web.org/beowulf_study_guide_answers_key.pdfIn PDF document text
    • https://mejapibidar.weebly.com/uploads/1/3/4/3/134315264/8240201.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/jibevuvegobobojazet.pdfIn PDF document text
    • http://fupefabesosada.mygamesonline.org/jason_and_the_golden_fleece.pdfIn PDF document text
    • https://cdn.sqhk.co/fiduzosi/qVieP8n/best_gps_speedometer_for_bike.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/ahbibhi/jumper_color_switch_balloons.pdfIn PDF document text
    • https://cdn.sqhk.co/zamokaxu/ogcWggc/vafabezupikowa.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/bidurudilidujug/50176513711.pdfIn PDF document text
    • http://fivilupagikozil.rf.gd/72515099607.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/email_template_asking_for_documents.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/i_wonder_why_curtis_stigers_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/73413670879.pdfIn PDF document text
    • http://xologikaju.atwebpages.com/nitisovupuzoli.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_off0000e9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CD 5684 bytes
SHA-256: 2891249923d5f57a8dcf08cef9202da59c1b7c74162317aeccd0d94dbdfbc4cf
font_01_sfnt_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 9744 bytes
SHA-256: 683cf43110d6a5f87435ce56307062b4ad0b46b488b2e3601d7476252d9897f6

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