Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ca6f9859da8459…

MALICIOUS

PDF

46.0 KB Created: 2020-11-06 18:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: cd1a1903125957e3d9cfb2e2759f46ce SHA-1: ecbf7634e8233060f65064bc33386d1aa980e911 SHA-256: 59ca6f9859da84597eb9180f47c761569b2543056738bc34fd94a8aac76b40d0
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://traffmen.ru/aws?keyword=kedamono+without+mask In PDF document text
    • https://vufufibujirefe.weebly.com/uploads/1/3/4/3/134355905/6434598.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/mijedusovineti/45250038042.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/fizimobaruweboratiweti.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/12445448934.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/kizej.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://fovodifikade.files.wordpress.com/2020/11/xitabuxaradozazurobuvuk.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/a_child_called_it_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/sidezeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32c1f0d3-824d-4893-a88c-baf0527bebc9/52977470022.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/teclado_emoji_keyboard.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/refopapefiburolubador.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/kesudilewalikikij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6187 5800 bytes
SHA-256: de7403cc1e1b03e792638812982d741a425f0765afdeb5e5ca9c79b725fb7524
font_01_sfnt_off0000758f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x758F 5060 bytes
SHA-256: f2f005d66e1a2949ebcf826297ed646e601b7e890a400958acc233692034ce0d
font_02_sfnt_off000086b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B4 10508 bytes
SHA-256: 4c5088b2756eeb817d35674c6a2dcb04ea3f36c85cabe1d44f3031149e735167