Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5773e650892d51d…

MALICIOUS

PDF

97.5 KB Created: 2021-02-17 19:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e9e9a80ae89292e9915f25998a845e8b SHA-1: 975d90a62a919d4408d1405d46e0e2caea0d5630 SHA-256: d5773e650892d51dede47221abdb2da77ef71b7c9ea1c535e78adbed270c6401
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://jacksth.ru/123?utm_term=how+to+start+candle+making+business+from+home PDF link annotation
    • http://arthromedro.xyz/firazefabekoveshfdl3.pdfIn PDF document text
    • https://mepodatadun.weebly.com/uploads/1/3/1/4/131452799/gatenesodajij-kivapopepuzujis.pdfIn PDF document text
    • http://ru-1.casa/partitura_del_concierto_de_aranjuez_para_guitarra4tp7q.pdfIn PDF document text
    • http://gratoraama.space/53618095562s2hx0.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/gjgdjeP/miranda_lambert_settling_down_meaning.pdfIn PDF document text
    • http://badgesverified.com/4920549831dpp47.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/bizamesuwepe/internet_speed_meter_pro_apk_rexdl.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/renaissance_periodization_template_macro_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/67115941115.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/difficult_calculus_problems_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/tojolajufura.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/75788063914.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/antivirus_for_windows_7_free_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/tapekule.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/reported_speech_statements_l_g.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/segalovosetij.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/annual_physical_exam_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/sleep_apnea_alarm_android.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_off00013f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F64 5692 bytes
SHA-256: f1a2195a3dd0049b06955cf4ce3dcbb7b994580134faf188640257fc6bf92fe8
font_01_sfnt_off000152a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152A5 11252 bytes
SHA-256: caee9b336a88389644647738e7a2de3a454517b962f9dfc3d4005ae974792052

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