Malicious PDF — malware analysis report

Static analysis result for SHA-256 b709c79839bb2465…

MALICIOUS

PDF

43.3 KB Created: 2020-10-28 13:15:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 2933d3574ee15be2237331b23a05b952 SHA-1: 314eeb5b8efea0e7e3d81431053c0aad52daa3ed SHA-256: b709c79839bb246508f9bfaeba0b9281ef1d756a88590d5c0f7173b07f04dc5e
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=office+manual+template In PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/vitobeniduz-kudiro-datedixav-vowuxikav.pdfIn PDF document text
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/7278131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f8762218ef6d.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/9486422.pdfIn PDF document text
    • https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/wulanerozotanabevako.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386074/normal_5f970e1e8f9de.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/7d3cf127-2770-4c87-9f0a-e06ed16ea8ef/96709995818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ce2710-5c96-4f28-bca2-980b512c8e33/kovuzezugoruruwedozuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453d9576-1c93-4a41-a4bc-9b837618040e/57378391624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3fe1d4-215d-4f6b-abbc-098b2c724a0c/wosesukunuwer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fb05044-62a2-481d-a832-ad3b99e92338/monepakubapigijoxadunidav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1976b0b1-8558-457b-b300-d9aa41218511/budoweporuwesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26cd049f-8688-496e-89ac-e8ecfeaaae28/fall_out_3_walkthrough_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/950fd3c1-b93d-44cf-b1db-d5a9fa6fb8c9/greenville_county_online_arrest_records.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/xipozibovatedidati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec73eeca-cf6b-440d-93d6-74520ffec1c2/78608052452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/59509487195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613bf2f9-6587-4d6d-ac29-fa5ba2703b85/jetumuzokolagopuladujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cac9506-d975-4742-80d1-52347eb2a280/lebebofevufugubix.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_off00006c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C84 4916 bytes
SHA-256: c956d5be4e139a7adf182d4d7bc4d40e00f5872222ebc9322f2d66aeda3680cf
font_01_sfnt_off00007d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D30 10360 bytes
SHA-256: 5829c2ea8aa2de4e72c1db2c3a631b9b1b5b59b36479ac87756cf3171e5d528a

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