Malicious PDF — malware analysis report

Static analysis result for SHA-256 1679365b5a9a77f4…

MALICIOUS

PDF

44.6 KB Created: 2020-10-28 17:15:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: fee0a12e7cb60056ef50041103219fc8 SHA-1: 049e279ac00af065d17f41eed2ce6cba13632b8c SHA-256: 1679365b5a9a77f42de67f7b7ebf0f570dbc10fd6fea384e99f08e79ffba22c3
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/pify?keyword=nascar+fantasy+advice+kansas In PDF document text
    • https://lozagazol.weebly.com/uploads/1/3/4/2/134266804/gazeridoxilos_lafenijesexijij_tevos.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/f377059bf474c3b.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/6d288a951512201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5f8dda801e305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403418/normal_5f992c7da9a3c.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/bufagutaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5f923166a48d2.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/cf9f1d80d.pdfIn PDF document text
    • https://lirabofopexile.weebly.com/uploads/1/3/4/3/134356775/3619439.pdfIn PDF document text
    • https://vavuxajibibugu.weebly.com/uploads/1/3/4/4/134472661/c12128ea.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/959063.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/bofejuxadisu.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006ee0.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006ee0.bin)
    • https://s3.amazonaws.com/vonuxagupeduze/26106616321.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/bipolar_treatment_contract.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0126/9405/files/pisipezedarexogepo.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/breastfeeding_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3600/2462/files/eighth_grade_spelling_words_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8697/7441/files/27233359128.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/you_are_your_own_gym_apk_free_download.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 extracted file (font_00_sfnt_off00006ee0.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE0 5176 bytes
SHA-256: 8f1b867a7749b73e3faeed608f65ef9d57f40899669f43797ab70cc4d79239c1
font_01_sfnt_off000080a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A7 10544 bytes
SHA-256: 680e99dc14f24f8beb79a2b240fae8eacc96663f10a25c8f251418b01c66499d