Malicious PDF — malware analysis report

Static analysis result for SHA-256 568af68bfa39aa3f…

MALICIOUS

PDF

38.2 KB Created: 2020-10-31 03:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 0bc3da2b9ce6eb361cc81b4afcaef597 SHA-1: 52a6cdc12288cc7ed5c4c1c994553d6d8b866e7c SHA-256: 568af68bfa39aa3f69bc77a2261efe1f61324d241f14c6088c0aa94db3fb9462
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?keyword=character+trait+graphic+organizer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411694/normal_5f9c04345719b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f94a3bf35cb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5f8991f883350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5f89d3e6e1ced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5f909381c8e54.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000574f.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000574f.bin)
    • https://s3.amazonaws.com/sugaguxagu/fupezemuguxizudawurin.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/niko_name_meaning_greek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad2dff0e-e521-4e0d-9c5e-c58c0b29559f/kizeregalaminefubu.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/what_is_the_coagulase_test_used_to_differentiate_between.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/aneko_yusagi_gender.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/kozik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12247897-c636-4dd2-a197-82a31ed9ed6f/kimofilojaweturawitez.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/1659833134.pdfIn PDF document text
    • https://s3.amazonaws.com/xatojem/fairy_tail_filler_reddit.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_off0000574f.bin)

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000574f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x574F 4940 bytes
SHA-256: bb74cc5a9f503285312d9dfd884279e70deb47ef0eba2f8c688def58f15f3da7
font_01_sfnt_off00006819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6819 10528 bytes
SHA-256: 60c2fc786584fc2748ae21095e4aaf0cb76c2edc7b9ad2356799d3c01007fd22

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