Malicious PDF — malware analysis report

Static analysis result for SHA-256 67811ea1b7216222…

MALICIOUS

PDF

45.7 KB Created: 2020-10-02 22:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3371dbfa56982398063d52602f00985e SHA-1: 9732c3196b30fc39250ac86a5d586a9f3f4e4f49 SHA-256: 67811ea1b7216222d4244b8dd074519bfb9336413660ab367ef1e9dc84e28a7c
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://ttraff.ru/pify?keyword=lego+tow+truck+60056 In PDF document text
    • https://site-1036644.mozfiles.com/files/1036644/zifafosis.pdfIn PDF document text
    • https://site-1036869.mozfiles.com/files/1036869/71965940094.pdfIn PDF document text
    • http://veroxa.ernst-arch.com/uploads/1/3/0/7/130776132/b881083659.pdfIn PDF document text
    • http://files.millers-crossing-design.com/uploads/1/3/1/4/131453221/2678473.pdfIn PDF document text
    • http://files.tealforteal.com/uploads/1/3/0/8/130874261/lofujasebipewexazi.pdfIn PDF document text
    • http://sozitup.cliffordstearns.com/uploads/1/3/1/4/131408849/zosonifizurek_zipuvi_zafinotor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2746/6904/files/joxeponot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/white_german_shepherd_for_sale_ohio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6329/5654/files/avery_postcard_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4249/5899/files/saaho_full_movies_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9344/9122/files/castle_of_glass_linkin_park_mp3_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2631/6455/files/the_seam_of_skin_and_scales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5171/2422/files/64548345534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2656/5285/files/trabajo_en_equipo_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/nevermore_rwby_reddit.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000507b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x507B 4792 bytes
SHA-256: c066927b3bbd6bdbebcc11965f998d8501107fc56be86820771a7a0804ef170f
font_01_sfnt_off00006104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6104 11296 bytes
SHA-256: af9b1a490703dcc9887d18f4fe20e491a41dc5a5cca2f662b376dba44fd0b1a5
font_02_sfnt_off00008629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8629 16280 bytes
SHA-256: c46a38c984292fed5cdf715fd39c592192bf93142506c53c270b31b1bee14c5e
font_03_sfnt_off00009bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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