Malicious PDF — malware analysis report

Static analysis result for SHA-256 449310b16f4dabba…

MALICIOUS

PDF

45.2 KB Created: 2020-10-25 19:11:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 10b59a6b61169ea5e82cada89030ca34 SHA-1: 6f390e7431d048e8121bb3037cba376c05bd4b0b SHA-256: 449310b16f4dabba231c103894df69a90ecdb2564560ee6505b7ac88388ef1cb
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://cctraff.ru/123?keyword=bir+withholding+tax+table+pdf In PDF document text
    • https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/2dd9a5e9558.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/zobugoralutu.pdfIn PDF document text
    • https://zozilevijuni.weebly.com/uploads/1/3/1/3/131383476/c6231.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000713b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000713b.bin)
    • https://cdn.shopify.com/s/files/1/0486/0752/7077/files/describe_a_person_esl_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/kovuxoforojijuporid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9314/0664/files/48710052922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6117/7237/files/free_printable_christmas_plays_church.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9287/6705/files/football_manager_2020_android_tips.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4126/5566/files/reduced_adverb_clause.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5269/9300/files/skam_season_1_episode_1_wiki_fandom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9198/3013/files/bidufuvanezedivala.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/articulos_cientificos_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/nuxile.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/birthday_invitation_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5067/1514/files/zukigenurunokukepoxuwel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9979/1265/files/sufumufenosu.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/fipilizo.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/fazeligukimegasepuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/83126241462.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 extracted file (font_00_sfnt_off0000713b.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000713b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713B 5472 bytes
SHA-256: 2a37499978254415feda2934fb41386f4d10e8d41552b2f03666b2f24a092392
font_01_sfnt_off000083ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83ED 10448 bytes
SHA-256: cae678a40c0905810cfcf4257a9af4b15d156e092cf5a4347023cfc5ddf0da92