Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef064e4ef0999fe6…

MALICIOUS

PDF

71.7 KB Created: 2021-03-08 17:24:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d065d578268a682df488bf9032ff55a9 SHA-1: b07524fcd01433abc26484354125eec9ea8db5d3 SHA-256: ef064e4ef0999fe6fc7add85a9a015c0d0ad6163bba4a5646e1367b06d8d8285
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/award?keyword=boronizing+process+pdf PDF link annotation
    • https://cdn.sqhk.co/towinomer/Ne0hggh/98180718129.pdfIn PDF document text
    • https://cdn.sqhk.co/munakuvu/cjibgjd/teacher_assistant_grade_book_high_school.pdfIn PDF document text
    • http://bella24.xyz/46107692131on8le.pdfIn PDF document text
    • http://vuvuga.xyz/fuganasd2qw.pdfIn PDF document text
    • https://varepanuror.weebly.com/uploads/1/3/5/3/135394497/zugugop.pdfIn PDF document text
    • https://widegavadiwudux.weebly.com/uploads/1/3/5/3/135325068/nogudaj-tawovako.pdfIn PDF document text
    • https://cdn.sqhk.co/nodezaneripe/epjaiew/xobulisij.pdfIn PDF document text
    • https://cdn.sqhk.co/pegebatanuz/gigcDJk/tiptop_esl_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0716c94f-d196-47b5-87b2-792637523b25/zetone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09231c2a-fd12-4f03-b170-6343465dccdf/lidimazagofegapovozido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1306a4b4-9107-40a7-8e1a-4da8b8b37678/29513462938.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/8304049581.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/android_error_resource_previously_defined_here.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ae25aee-e275-4209-a9b4-08a35d26570e/que_estatura_tiene_eva_luna_montaner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2013cfd8-5667-4bfb-ab7c-31c5046ea98c/edward_said_culture_and_imperialism_slideshare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea0ab71d-ea23-4219-a51f-003fa64bf9e9/vizilikivijufomipo.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/lidowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bfc3218-9603-4ffd-bcc5-b2b05557e01d/domav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c39b44-b4c6-4d3a-a49d-8001f7059a0e/pafabi.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_off0000dd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD40 5180 bytes
SHA-256: 918f7269f2aac675dd39ae3e6124d2c2b0998e94fd9a5ffb2e1ef44f598428b1
font_01_sfnt_off0000ef04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF04 10140 bytes
SHA-256: 08e0328c079578efc10bafa9c9fad11a6938e90ba58fca37f935b0b9842b443a

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