Malicious PDF — malware analysis report

Static analysis result for SHA-256 73687dda5a2b181c…

MALICIOUS

PDF

72.6 KB Created: 2021-02-23 03:37:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9d225bdbae0d7e430aba9d2b3ee6538a SHA-1: 79245effb05b33aad69774652fab0edf8af9d9d5 SHA-256: 73687dda5a2b181cf7aff114a46ad7bd03ee62afb032041da84d1f5ff90a16a7
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/wix?keyword=i+am+the+night+color+me+black+script PDF link annotation
    • https://cdn.sqhk.co/befozaxulot/kgigNge/23356040660.pdfIn PDF document text
    • https://vuwuzujos.weebly.com/uploads/1/3/2/7/132712237/nideg-katawemipewuned.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450624/normal_60151ed07d924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495686/normal_60306888d604e.pdfIn PDF document text
    • https://cdn.sqhk.co/diwewiduvaz/d18jecd/12628331773.pdfIn PDF document text
    • https://bijejumutitin.weebly.com/uploads/1/3/1/4/131454352/ginapuledafof.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/jNlpuVf/runekogoju.pdfIn PDF document text
    • https://cdn.sqhk.co/kelarega/icgeM9z/11832066078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464722/normal_60037b5223757.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384154/normal_5ff780048f500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446016/normal_5fcd1a784b928.pdfIn PDF document text
    • https://cdn.sqhk.co/butituguxur/1ZjbVjf/phoenix_movie_theatres_in_monroe_michigan.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzowadijavu/BY8Ijgd/descargar_pet_runner_cat_rush.pdfIn PDF document text
    • https://cdn.sqhk.co/xedaberetaj/Jjjjjgt/vafixize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_6010b6fa797e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_60255de055fe6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491723/normal_5fde2d891621d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421472/normal_6031484d02816.pdfIn PDF document text
    • https://cdn.sqhk.co/rupomotiz/j4MfTEo/bloodsport_22_crossbow_bolts_6_pack.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB6 5488 bytes
SHA-256: 0622ef5221a891d21692834af3b6e514742c91fa1297ed1fb319634e7a67e95f
font_01_sfnt_off0000f236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF236 10248 bytes
SHA-256: fb1f075b8a529584a6cf4924a2c58299bb81f19ed53c26fc1ad1df29a0f8d483

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