Malicious PDF — malware analysis report

Static analysis result for SHA-256 1faca1ac67c51d1d…

MALICIOUS

PDF

43.2 KB Created: 2020-09-30 04:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b603469a1dcfc9835c7b1ebc9862e6e9 SHA-1: a1da1b6df39f0bdd5769f69ff17d5084ca1a6a82 SHA-256: 1faca1ac67c51d1d26fa1afe3243136dba8b602c6c2560d031edac879491cfb4
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=design+of+single+scissor+jack+pdf In PDF document text
    • http://files.clpsfamily.com/uploads/1/3/0/7/130776511/lunesironesako.pdfIn PDF document text
    • http://xukupepe.tomcondotta.com/uploads/1/3/1/3/131398488/devegupobidoma.pdfIn PDF document text
    • http://files.siglapircc.com/uploads/1/3/1/4/131437924/961e00a10c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d543d6cb-cd20-4db4-b6db-4db019761bcc/68672337164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c470927-208b-4e50-abda-ed07785d935d/70706422648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5facce74-7003-4ecd-b19e-846244c81172/pulowax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee8a5ec-4e70-49bc-9201-116cdb2f0ff1/78203669279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b341c648-f2ea-49c7-b68e-4f1df18ad6ef/likugamofufakiwuxun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37253d37-1868-4e4b-bf2d-c2a6838e749a/633592509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3510d58f-4c32-4757-95bf-10289add8089/dowovunuwujubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb836d4-e215-4ec2-8a83-0b300797c4b3/35269965138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6871/7216/files/anno_2205_moon_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/28268925313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2286/6839/files/concussion_baseline_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1603/6249/files/xefidifozavusijubuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/ultrasound_scan_report_abdomen.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A85 5460 bytes
SHA-256: c1a2784aaf4ded8c3b1099ce2d0ce475f76e2c98db19e0e3cc5fae71e8b9b637
font_01_sfnt_off00007d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3C 10120 bytes
SHA-256: f18ef9bb284bcdd6344dadd7b78a5d32acfe2ea80f5cf08c87f8a0f5570603cc

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