Malicious PDF — malware analysis report

Static analysis result for SHA-256 300de5e10a4f470b…

MALICIOUS

PDF

70.2 KB Created: 2021-01-28 16:32:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cf764ae1b5380a44bbd4dfc2f38bfde2 SHA-1: df8944f28abc9d6badd7ab2a596c00727e4126c3 SHA-256: 300de5e10a4f470b9864981b42c68e0a088493e9fddcd788cab3e71b36587551
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=free%20diamond%20price%20calculator In PDF document text
    • http://morasufas.iblogger.org/56305614102.pdfIn PDF document text
    • https://kanunobak.weebly.com/uploads/1/3/1/0/131070574/7893384.pdfIn PDF document text
    • https://dizufarul.weebly.com/uploads/1/3/1/3/131379939/9302449.pdfIn PDF document text
    • https://dumuzuvo.weebly.com/uploads/1/3/4/6/134695275/8598195.pdfIn PDF document text
    • http://tdsevsvet.ru/buzadedanavogaval9wxy.pdfIn PDF document text
    • http://vosalax.22web.org/sexijarosetateg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sadisuden.epizy.com/bugevikulavenodu.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/atomic_theory_1._9_periodicity_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/illaoi_guide_s8_aram.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/93520183555.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/securities_commission_malaysia_sc_equity_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/video_tsunami_palu_mp4.pdfIn PDF document text
    • http://tabifewegijip.epizy.com/chapter_7_apush.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/fagezupe.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/platform_picture_ajay_devgan_ka_video.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_off0000d822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD822 4996 bytes
SHA-256: 2ffb03177349b9dc9b46ede2d6a89e0774be7eed191c2fb59388ae051e3ba51c
font_01_sfnt_off0000e90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90A 10192 bytes
SHA-256: c72113518c2023b03ad90aff7735fa23171057d638e74b5031c2768cedaf1c95