Malicious PDF — malware analysis report

Static analysis result for SHA-256 891ea6b0dc4ba622…

MALICIOUS

PDF

71.9 KB Created: 2021-03-01 01:31:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: efe6eaf5dfce8263dfc585549d747413 SHA-1: 67cdf217068a0adf016c23eac9cc470db7eb58e3 SHA-256: 891ea6b0dc4ba622b7ae96eaa35da43fda97254b774e3c7c481631c99fe58b2b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=body+medical+term PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418166/normal_5febb478f3f34.pdfIn PDF document text
    • https://vebunigujop.weebly.com/uploads/1/3/4/3/134367951/gatidozuxa_zedifozatopi_laxasovonulak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448740/normal_5ffc720d3f634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473062/normal_5ff87d9b8e385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504839/normal_601e7ab76d2bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_603ab5da530a0.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/daxemo/best_uv_protection_fly_sheet_for_horses.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/girlfriends_guide_to_divorce_season_1_lyla.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/chasers_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/sisijibenetopoj.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/how_to_look_up_a_citation_number_in_texas.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_off0000d749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD749 5056 bytes
SHA-256: 372a5935be47299270ee583087b4134d6b7c080127d54a35f0a6b93448c5c96b
font_01_sfnt_off0000e86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86A 13404 bytes
SHA-256: 7548d6b5c29f96c46f4691e8a9092e8eb2ddbff1f87c44f24631b6e7e773a6e1