Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc493aedf09f164…

MALICIOUS

PDF

72.5 KB Created: 2021-02-24 23:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2d2e0a898f0b165074d445b9ac618a2e SHA-1: 6b70339933c9435260554eac129de389bd23ffe9 SHA-256: ebc493aedf09f164d98e990d807c06c4b122ef50a3c329b6af8a9c5134543aba
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://druttle.ru/wix?keyword=national+audubon+tree+guide PDF link annotation
    • https://wesedujixezibo.weebly.com/uploads/1/3/1/6/131606467/8572500.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/jOaaCjf/best_radio_stations_italy.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/KgeGkKn/86081254839.pdfIn PDF document text
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/5086a18d756aef0.pdfIn PDF document text
    • https://cdn.sqhk.co/mugukawi/iaSjggf/8385119419.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/Kiegeif/five_little_frogs_jumping_on_the_bed_song.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/wieVv75/reading_skills_worksheets.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/fulosobezur/ap_telugu_news_papers.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/fujokoxaxinadepotobos.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/barbados_immigration_passport_application_form_b.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/88298068489.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/43790559162.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/zefinagol.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/supimuxobiwetijapufifele.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_off0000e1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A7 4924 bytes
SHA-256: 6f60eaaf41a1d0ee29454762973af32f9764856a01b831662e764a32a2e89c2f
font_01_sfnt_off0000f277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF277 10000 bytes
SHA-256: 134dbc820fca59bc1092d6e4f58cbe490df8e900cbf17048a640ca387a5c00e2