Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f4b0fb0b8d634a…

MALICIOUS

PDF

43.1 KB Created: 2020-10-12 17:34:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1462e97b51da8fd65c5c1032896c7f52 SHA-1: b81d887aa6527b8d1fde5abe8c2116e3b7bf0ca3 SHA-256: a3f4b0fb0b8d634a6be67dc27d64af2baeba3f03528b4368d2cbb3a0fb6f536c
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://cctraff.ru/strik?keyword=manuale+d%2527amore+2+full+movie+sub+indo In PDF document text
    • http://zavemigo.quintinowens.com/uploads/1/3/1/4/131437657/1022824.pdfIn PDF document text
    • http://files.dragonflypediatricot.com/uploads/1/3/0/7/130775199/4638512.pdfIn PDF document text
    • http://rijozo.jpalawfirm.com/uploads/1/3/1/4/131406798/9215437.pdfIn PDF document text
    • https://site-1043259.mozfiles.com/files/1043259/wesasifojefobexanawinazop.pdfIn PDF document text
    • https://site-1036696.mozfiles.com/files/1036696/duxinepewupar.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/1/0486/1172/1381/files/pugedifiwoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2171/9959/files/nakixisef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8399/6063/files/duwuraruluxevezovujebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9433/8453/files/jujej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5843/0106/files/rocket_fuel_on_a_budget.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9361/2949/files/electric_scooter_battery_36v.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0126/5566/files/5696315162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6138/6147/files/pats_tennis_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6600/7445/files/kabowome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8506/9477/files/firefox_export_cookies_json.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_off00005cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF7 5224 bytes
SHA-256: 899a462cca6b1086d4d1e86265807c1d63113512a62d35bb5f5754ddaa6dcba8
font_01_sfnt_off00006ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA8 10104 bytes
SHA-256: 56a0b55a37f86a971bc553f7155bf68b2ae2c4fb62c944818b18a24d0895f6e0
font_02_sfnt_off00009141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9141 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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