Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9e9ec094c12bd0…

MALICIOUS

PDF

40.8 KB Created: 2020-08-11 14:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8caf6dfb440087b36ebef48a260e709d SHA-1: 65a632fde777718aa4860e42b51515bc43cabfe0 SHA-256: af9e9ec094c12bd0900c1d01c1f1a18517b75efa94ea2fdb9a0a90cce64673d7
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.com/pify?keyword=download+boucher+prosthodontics+pdf In PDF document text
    • http://files.farnhamloveyoga.com/uploads/1/3/1/3/131398533/3925830.pdfIn PDF document text
    • http://files.wmbands.org/uploads/1/3/0/8/130814706/juwaparateb_xuletanone_wugidezus.pdfIn PDF document text
    • http://files.perthbiblechurch.com/uploads/1/3/1/4/131437948/fa016c0f62b226.pdfIn PDF document text
    • http://vemiz.themaggiesociety.com/uploads/1/3/0/8/130814328/7510984.pdfIn PDF document text
    • http://files.fear-less.co.nz/uploads/1/3/1/3/131398573/xodibari.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/1/0433/4767/3253/files/ziwovosum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1301/2630/files/logical_mathematical_questions_with_answers_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/40455073757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/kegiragobeterigufipim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/nawimonixepatuwedasesip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/sigokufisaximajafuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/zewurukem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/gilenaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8373/3921/files/60464798700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0692/5720/files/richard_bach_one.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7170/8065/files/brihaspativar_vrat_katha_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/tixudutemalozit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1320/0278/files/xedekebuxo.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_off00004897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4897 5472 bytes
SHA-256: 32ce92586a4589f803f03dbe94b739c5875100589e832a998d5bd2ad8a6d1b22
font_01_sfnt_off00005b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B39 9844 bytes
SHA-256: 6fb5e687b3eb08c1592c3020772cd7bf2b57ea8a7746b0fb7f8d0afc06a25f78
font_02_sfnt_off00007d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2B 17040 bytes
SHA-256: 1d1ac8659e86718fe776612460bf107f9a2171a41a36a5b70fdeacc7f88f8938

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