Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50bf59f8098a505…

MALICIOUS

PDF

77.9 KB Created: 2021-01-28 16:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: aace3e810279911343b4b272971d80ad SHA-1: 099844bf77e55184f433f982453930188697c92e SHA-256: e50bf59f8098a50582ccfc34631b1de4c84fd17275136d20a39b9c2279e942c6
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffnew.ru/wb?keyword=descargar%20stickers%20para%20whatsapp%20memes%20en%20espanol PDF link annotation
    • https://cdn.sqhk.co/lenufetimop/PjgvJhf/junior_project_manager_duties_and_responsibilities.pdfIn PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/4511283.pdfIn PDF document text
    • http://steelsho3.club/72073006116jtbz0.pdfIn PDF document text
    • https://danegatazi.weebly.com/uploads/1/3/0/7/130776269/nisokunali-fedoxurigagug-julabigigaga.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/kufunoli_ronos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://purubonosarule.rf.gd/binuxerisisumijanolarawu.pdfIn PDF document text
    • http://nozuwodapa.epizy.com/maths_worksheets_for_grade_8_rational_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/pandora_free_internet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/lippen_schweigen_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/mekiw.pdfIn PDF document text
    • http://zokitidekav.epizy.com/49347354504.pdfIn PDF document text
    • http://mikesivu.rf.gd/web_analytics_reporting_best_practices.pdfIn PDF document text
    • http://dazoxamawix.rf.gd/firigefu.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/misizotaputita.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/13373732030.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_off0000f0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DA 5500 bytes
SHA-256: b6bdde500108657bf25e70a24d2376f83fb9e5e199ec9a96f82ddd83a8ab8e9a
font_01_sfnt_off00010387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10387 11988 bytes
SHA-256: fc052b0cd6c29b86338ab8c51729909ae5c4beb19358a619f10b28bd396e6acf