Malicious PDF — malware analysis report

Static analysis result for SHA-256 36993cd5a54940db…

MALICIOUS

PDF

72.6 KB Created: 2020-10-01 09:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d8db215064fd6d509fdd188f83f82447 SHA-1: eaac76108dd1cfd794f4afad4c0bf2d1643ec9d5 SHA-256: 36993cd5a54940dbda7d6229b850fcf1815c40e5c46607c53e2883babaeb8a0a
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=changeling+the+dreaming+shadow+court+pdf In PDF document text
    • http://files.sacredgeometryalchemy.com/uploads/1/3/1/3/131383045/0b23844ce9fcb3a.pdfIn PDF document text
    • http://files.simplepathproducts.com/uploads/1/3/2/3/132302982/tebup.pdfIn PDF document text
    • http://binusid.mapinkart.com/uploads/1/3/0/8/130814471/d818cc60fe99f.pdfIn PDF document text
    • http://jivodadex.taufiorito.info/uploads/1/3/0/7/130776007/9f9269e.pdfIn PDF document text
    • http://golivonu.myhgbc.org/uploads/1/3/1/4/131437987/lizotenugab_guwupo_zerudolixi.pdfIn PDF document text
    • https://site-1039487.mozfiles.com/files/1039487/63502714060.pdfIn PDF document text
    • https://site-1036627.mozfiles.com/files/1036627/guler.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/1/0429/2775/1321/files/bubomum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4493/7628/files/79441132874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/fiwawirisijekibomipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2496/2968/files/caballo_de_troya_5_cesarea_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3035/9457/files/73817660726.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_off0000d17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17E 5564 bytes
SHA-256: 0a2a463e0a38089e44b8147df3de4c5e676fb275d04945c9559fe493a3ced698
font_01_sfnt_off0000e450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE450 10240 bytes
SHA-256: 8cf33e0cab7338f79d9e76eaaa89347e144dc7c4c3a779a862a1d10a4fc1f626
font_02_sfnt_off00010759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10759 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71