Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6997cd30f255be…

MALICIOUS

PDF

80.9 KB Created: 2020-12-29 22:48:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ed3199a2da24d06455dd0aa95832b8fb SHA-1: 73887a59e7da5031686feac2fa92e010035d84f1 SHA-256: cd6997cd30f255be8a11839bb1aae0baad9f3edb0ccef5eaf5aa6654d98e4c10
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to redirect users to external content.

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://trafftec.ru/strik?utm_term=wii+sports+mini+games PDF link annotation
    • https://cdn.sqhk.co/monasomeb/x8hjVgd/world_history_textbook_answers.pdfIn PDF document text
    • https://zolerowiz.weebly.com/uploads/1/3/4/6/134691656/jilutagixade.pdfIn PDF document text
    • https://buwuwewofopalun.weebly.com/uploads/1/3/4/0/134097592/kajaposexizelej-bezezuteruj-jozofibev-notoxefo.pdfIn PDF document text
    • https://rawunixu.weebly.com/uploads/1/3/4/5/134527334/ad73519d6e5.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/vuliwisuwig/5477174597.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/assamese_whatsapp_status_image.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/epdm_material_safety_data_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16245683-80b3-4377-b874-42c6baff308c/picture_symbols_used_for_written_communication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a097d36-d721-4935-baa8-30b4b81012ba/penukugafexipazuvunese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a512223c-dd68-4dcd-b0aa-27ccded46be1/escape_planet_earth_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/geletafafawagofe.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/bharat_ratna_award_winner_list_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc80787-2670-45c1-bb0c-f000805a4c2f/calligraphy_alphabets.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/64806708731.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_off000101ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AB 5120 bytes
SHA-256: e109c497907988b375ff5cd43add58831914770ce32cd82f09b2a1ada9a8d924
font_01_sfnt_off0001130d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130D 10500 bytes
SHA-256: 2857ae8008ed7e9c40e13d017d7545a4e2834460845290f75a803ffa7010a083

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