Malicious PDF — malware analysis report

Static analysis result for SHA-256 889becdc4cf5d0b2…

MALICIOUS

PDF

76.2 KB Created: 2021-03-15 17:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 10e435af9b20cb32dd7c21a5ac6c0dd2 SHA-1: 1cee42fce834063bfbf9a9ec1022d00bf5ce526f SHA-256: 889becdc4cf5d0b2adf3a8506e1bbb1d9acfb3a07dbd694e199520c92d21d49f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://jumiwimov.ru/123?utm_term=prado+museum+madrid+audio+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487625/normal_5ff802bace12d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458628/normal_5fc8293333901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491169/normal_602fc0a73d47b.pdfIn PDF document text
    • https://kibolimu.weebly.com/uploads/1/3/4/8/134872751/fodum.pdfIn PDF document text
    • http://gesetaxoxu.sportsontheweb.net/apprendre__dessiner__la_japonaise.pdfIn PDF document text
    • https://minomawisagu.weebly.com/uploads/1/3/5/9/135956859/1435588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466664/normal_604d19be0a801.pdfIn PDF document text
    • https://xoxatujetila.weebly.com/uploads/1/3/0/7/130775098/d6ed2888ca.pdfIn PDF document text
    • https://wasizizinawuj.weebly.com/uploads/1/3/6/0/136096362/savipi_jopagatopujoxit_kudir_luvuzakotufena.pdfIn PDF document text
    • https://siwuluwavati.weebly.com/uploads/1/3/4/7/134756127/2877708.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417527/normal_5fe3ed9f38826.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/thank_you_reply_email_for_appreciation_sample.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5fcaf0f18c33f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501482/normal_5fc648044b5a4.pdfIn PDF document text
    • https://wadenipix.weebly.com/uploads/1/3/1/4/131408068/vakuvotote_sogofowuzinoje_molasuvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_602c6acecef69.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/binujobinogoza_fefumiwi_jatewefosekeme.pdfIn PDF document text
    • https://bebedukiraf.weebly.com/uploads/1/3/4/8/134885496/7683350.pdfIn PDF document text
    • http://dokojekiferej.mygamesonline.org/on_the_road_full_movie_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vavadot.onlinewebshop.net/19889680234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa1172b2-a9fa-4db4-b4ba-8c6748f577fe/31551429462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/584eafdf-6e64-4e46-96bb-e56c4fd8bd4f/lijokategokilitulodikawiw.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_off0000ebb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB0 5116 bytes
SHA-256: 92b6ebe1fdcb34dbf24c5b69a5e7b899008b41d598485bf420d64993e3d808f9
font_01_sfnt_off0000fcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 11860 bytes
SHA-256: d42d340cd40626427d3ae6d0c343a5d98323774247a4e3ca829176ecc5640156

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