Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9dec075047563d…

MALICIOUS

PDF

137.6 KB Created: 2021-03-21 00:03:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d2d0e5c66c61344fab71b0ca2241e2ce SHA-1: 9f581d48ee07908623d41405a572680f2f3742a1 SHA-256: 9e9dec075047563d587c3256474620991e11be52283472ef406dbc6e56721ee5
194 Risk Score

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/award?keyword=advanced+language+practice+pdf+download+free PDF link annotation
    • http://taxevidel.medianewsonline.com/54859491116.pdfIn PDF document text
    • https://valejuti.weebly.com/uploads/1/3/0/7/130739952/1855593.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/gomamasiwekewiwomowagake.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/2nd_grade_math_assessment.pdfIn PDF document text
    • https://tatazopizen.weebly.com/uploads/1/3/1/1/131163492/piliz.pdfIn PDF document text
    • https://viduxetejogat.weebly.com/uploads/1/3/4/6/134600114/53b42ab.pdfIn PDF document text
    • https://vetolotex.weebly.com/uploads/1/3/1/3/131379132/tagebopigip-xegizefig-fatalumikogaxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://falufobi.epizy.com/what_is_potential_transformer_ratio.pdfIn PDF document text
    • http://furipurisebete.onlinewebshop.net/abide_with_me_piano.pdfIn PDF document text
    • http://xetemap.epizy.com/why_school_uniforms_are_bad_pros_and_cons.pdfIn PDF document text
    • https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_f7fbb1fce9f94cce8f4271c757c70412.pdf?index=trueIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_1ffbca115ec54707aa0f359c846286ab.pdf?index=trueIn PDF document text
    • http://fivamoxopel.epizy.com/alt1_clue_solver_guide.pdfIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_5abc9aaf87a947019f130a0bfe1e16be.pdf?index=trueIn PDF document text
    • http://xadupozitolewoj.epizy.com/liloro.pdfIn PDF document text
    • http://doxokalisawe.myartsonline.com/inteligencia_emocional_na_escola.pdfIn PDF document text
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_c46e4f0d95d34cea922adfb0556c62f5.pdf?index=trueIn PDF document text
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_256b2dda611d40e2be2736781c799667.pdf?index=trueIn PDF document text
    • https://8ed7ad90-0d0e-491f-9c15-1f6cd5a61d18.filesusr.com/ugd/f1a804_bc50a88b46ba48778ad49c84592980dc.pdf?index=trueIn 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_off0001e02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E02E 5288 bytes
SHA-256: ec15e8c6a43c045a395dd37076e2170ef5c98624d1743f711092c5c588e07803
font_01_sfnt_off0001f24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F24F 11332 bytes
SHA-256: 54262999f6129ca1cf94f59b543f5c5efcc07429bea9ba29633cf4b4d6392d99