Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d48ae5b62553ac9…

MALICIOUS

PDF

74.3 KB Created: 2020-12-03 15:30:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: d4d52d37577562122c9b2add1634b9a8 SHA-1: 5a3a7c7058a136167d287360182a068c98bafd38 SHA-256: 1d48ae5b62553ac965c76fec4ca6b6774cfce7f4bea51efbd9a1b779bbad5f11
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a link farm designed to redirect users to external websites. The heuristics indicate a high volume of external links, many hosted on disposable domains, suggesting a phishing or scam attempt. The embedded URLs, such as 'https://trafffe.ru/aws?utm_term=formato+apa+2018+bibliografia+paginas+web', are likely part of this malicious infrastructure.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffe.ru/aws?utm_term=formato+apa+2018+bibliografia+paginas+web PDF link annotation
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/4862018.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/6818234.pdfIn PDF document text
    • https://fapasinexiri.weebly.com/uploads/1/3/4/3/134346339/2869515.pdfIn PDF document text
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/sipaxano-vakijujumuwi-lotulumava-jowejetuzaf.pdfIn PDF document text
    • https://serivuzoforin.weebly.com/uploads/1/3/4/3/134334639/4151654.pdfIn PDF document text
    • https://volinamonapefez.weebly.com/uploads/1/3/4/4/134494747/8766830.pdfIn PDF document text
    • https://zotadipijipas.weebly.com/uploads/1/3/4/4/134467791/kuzusajerakoz-lokomiji.pdfIn PDF document text
    • https://gepagalegizexu.weebly.com/uploads/1/3/4/4/134478943/bojidosurowisezodaw.pdfIn PDF document text
    • https://natagudere.weebly.com/uploads/1/3/4/5/134526504/futizokew.pdfIn PDF document text
    • https://degujipimisa.weebly.com/uploads/1/3/1/4/131453395/9034367.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/2fbfc689-a1aa-44e2-91f2-b86da026b102/83811575526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94ccc8e-0860-4492-ac75-2e72e6ebb4bf/11990310206.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcee278bc8713fe6fc4cb7/1606217255627/77212355988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40692894-6f3d-4f80-bbf7-a4b941740f1a/buffalo_ridge_elementary_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5024c1c-01a8-46ea-9ef9-63fb1d220f8f/descargar_gratis_corel_draw_x6_full_en_espaol_con_crack.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB17 5928 bytes
SHA-256: 077906ef22c270cd8c259c3a3a8b5dc6c26505150f97dc463c5cec1afe401489
font_01_sfnt_off0000df3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3D 11216 bytes
SHA-256: 1575f707b526eab5aaebb0a030cb55d3815c2a7a63a71d191b5cafca63df03da
font_02_sfnt_off00010499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10499 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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