Malicious PDF — malware analysis report

Static analysis result for SHA-256 168e51c9e3f3584b…

MALICIOUS

PDF

44.0 KB Created: 2020-09-30 23:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 0e7c69c59e375d1a6340785bc9eeee8f SHA-1: 4cd8a4180234ea0b07b198f0cd38b25e57207e18 SHA-256: 168e51c9e3f3584b48822308ec28e2190f3b8f5de062ec33ef5277aff0217f04
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://ggtraff.ru/strik?keyword=height+conversion+chart+inches+to+feet+pdf In PDF document text
    • https://site-1037869.mozfiles.com/files/1037869/65476897312.pdfIn PDF document text
    • https://site-1037145.mozfiles.com/files/1037145/kixobix.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/46722362524.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/95838076139.pdfIn PDF document text
    • http://files.foodforthesoul.net/uploads/1/3/2/6/132682585/toxetijekikudem_rijiwipefaduf_vumetov_nakajejisenu.pdfIn PDF document text
    • http://files.windhamjunction.com/uploads/1/3/1/8/131856207/rupezazipemiwoko.pdfIn PDF document text
    • http://files.melissalamoureuxlmft.com/uploads/1/3/1/0/131070912/2f0510cff.pdfIn PDF document text
    • http://files.buckinghamtherapy.co.uk/uploads/1/3/0/7/130738933/9745757.pdfIn PDF document text
    • http://files.worldofspanishllc.com/uploads/1/3/2/6/132681901/toxide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1053/1238/files/cset_math_subtest_2_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/8624/9883/files/madox_estate_design_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1347/1384/files/pevafer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/buroturibamure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be702f00-5095-4472-9937-6bf611c6735a/wavugoxiniwululijed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a0d1f4-25bb-4223-aeb5-5367b077815e/88697255541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0322f472-ad22-4e3c-8f79-fcf4310f6725/13201123123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0c80f9-536b-44c7-925e-51008567732d/joxemodasafof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c887a532-f52f-4793-91c5-cd3faae75c97/32694101194.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

Related samples 8

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_off00006e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E40 5408 bytes
SHA-256: 9251e9878d3a8c0f4a8d033d1d20ed9eff3a5bfb1b07ff0460bc6ad242aa1479
font_01_sfnt_off000080af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AF 10008 bytes
SHA-256: 64c04a5bf3178977ab8913dfbeb6dd853ebf36dc3d01c2a90a4aa037caa9d00f

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