Malicious PDF — malware analysis report

Static analysis result for SHA-256 56336fd753356734…

MALICIOUS

PDF

41.7 KB Created: 2020-10-01 21:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f59df49cce12cf7dea4a69744686ff17 SHA-1: 7ef26e9182f9e27dac3ad291bf000d731c4b032b SHA-256: 56336fd7533567347df69640f20e4d54bc8f6654f1f86644a52b3ed5b92db5e4
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/strik?keyword=adobe+flash+serial+number In PDF document text
    • http://files.europeanfilmsound.org/uploads/1/3/1/3/131383982/788721.pdfIn PDF document text
    • http://gametunup.mutiny-cannabis.com/uploads/1/3/2/7/132711949/luwejebigo_xatogewolubo.pdfIn PDF document text
    • http://sijotexun.graceforthebroken.org/uploads/1/3/2/6/132695780/vexemawepogu.pdfIn PDF document text
    • http://files.maketucoastguard.com/uploads/1/3/0/9/130969726/roromapibofo.pdfIn PDF document text
    • https://site-1037114.mozfiles.com/files/1037114/68718815954.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/tasokelaguke.pdfIn PDF document text
    • https://site-1039801.mozfiles.com/files/1039801/4757079278.pdfIn PDF document text
    • https://site-1038830.mozfiles.com/files/1038830/gukatum.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/83098804044.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4559/6569/files/momuwozof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/bloxorz_level_7_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/3468/8927/files/og_mandino_the_greatest_salesman_in_the_world_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9030/3389/files/88107529381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0796/2018/files/lonve_mp3_player_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5202/7041/files/scramble_for_africa_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7113/8711/files/chapter_8_ccna_3_exam_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8089/9991/files/encyclopedia_judaica_second_edition.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_off00006518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6518 5276 bytes
SHA-256: 244c0ec01aa46b90d84c401f2caa3c6683d10f5bbb1857dceec288ad15ee8428
font_01_sfnt_off000076dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DD 10308 bytes
SHA-256: f5b0abde167ba0eb13079bb7a74c2de7ba09e9a9ba388393d07a98269f76a50c

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