Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df3ec32b4290ce8…

MALICIOUS

PDF

49.0 KB Created: 2020-10-03 16:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 09cae67aa622b2f026d92299d3eebd77 SHA-1: b8438c5b0abf1ebb1428204db022882ed6a38d89 SHA-256: 2df3ec32b4290ce80f3b0661f7b45be7222acb380f8dd6e04b327df8cd245ab1
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://gettraff.ru/strik?keyword=epic+seven+breath+of+orbis+guide+red In PDF document text
    • http://files.tinasederholm.com/uploads/1/3/1/4/131437984/bedefujegekovo.pdfIn PDF document text
    • http://files.davidemariano.com/uploads/1/3/2/6/132681694/12d8564.pdfIn PDF document text
    • http://files.beaniesandweeniescrochet.com/uploads/1/3/1/3/131379329/soriwowe_zegisok.pdfIn PDF document text
    • https://site-1037029.mozfiles.com/files/1037029/20861335723.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/1/0430/7491/2410/files/zegisivowisidanijujunizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/american_experience_constitutional_change_courses_nscc_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4647/6708/files/gudovonebevil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/oracle_12c_sql_joan_casteel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8394/6401/files/ion_block_rocker_battery_replacement.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B22 5540 bytes
SHA-256: ade0b00e18731491392b6e01c864f088a651bcdab657569d48d840faf1c2a263
font_01_sfnt_off00007dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFA 10584 bytes
SHA-256: 4ad6fb9b7903a20c27ff30d4266c28caa29678d9fd6d2543725030317a1c7631
font_02_sfnt_off0000a25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA25D 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e