Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc595635b86a8df…

MALICIOUS

PDF

44.7 KB Created: 2020-10-28 12:50:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a789f01ec5c72e3593e5aa21475200af SHA-1: d7cb473acf2227f00dd5688c4124bf2dc8619bf7 SHA-256: 3bc595635b86a8df517557d167d381e4b26dec1b749f70f8dd31da793c4c635f
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/123?keyword=control+wizard+leveling+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f8721c0c8989.pdfIn PDF document text
    • https://kogatakuzomaw.weebly.com/uploads/1/3/4/4/134444425/a69c6.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/bd2ef7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f9434a8e26b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5f929778b4cc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f97d0e4dd152.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000071fe.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000071fe.bin)
    • https://cdn.shopify.com/s/files/1/0435/5738/8440/files/tracfone_triple_minutes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2576/2984/files/flash_animation_in_android_splash_screen.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/55063657756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8678/2371/files/where_are_you_going.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/gowakovuwibubejojivakisun.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/introduction_to_symbolic_logic_basson.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/embedding_a_gif_in_a.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/tiluges.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/51006471715.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/72970036990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8934/7228/files/45502692684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5590/4416/files/kisopizuxufukipe.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/meaning_in_hindi_dictionary_download.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/86608739173.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_off000071fe.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71FE 4920 bytes
SHA-256: a22e39588cd51c52a26c4b847d4ee32f3a134d5c2b7b066be8cceb0f0a218a1f
font_01_sfnt_off000082eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82EB 10284 bytes
SHA-256: c02a64126f215a9b808ea4208c50fe85fd9aff1964bcb28e757ac50345ce008f