Malicious PDF — malware analysis report

Static analysis result for SHA-256 981c77d060b5eea2…

MALICIOUS

PDF

77.5 KB Created: 2021-03-08 08:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a50d5c0079835e187d02e4ec7ef80b00 SHA-1: 9f286c0c36f08c7714dbf6f9ae37c6a57987a079 SHA-256: 981c77d060b5eea26228d9bdc4ca4754944912b2763338cd42d15e74c57d8f73
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to distribute malicious content or conduct phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://seumenha.ru/wix?keyword=faceing+math+lesson+9+conic+sections+answers PDF link annotation
    • http://gratoram.site/sat_reading_exercisesdw11o.pdfIn PDF document text
    • https://jabenawonidibe.weebly.com/uploads/1/3/5/3/135385032/2478775.pdfIn PDF document text
    • http://burrrhey.tech/volkswagen_service_center_operating_hoursqvquq.pdfIn PDF document text
    • https://givolejemaxo.weebly.com/uploads/1/3/5/3/135345859/c22a4078ab1331.pdfIn PDF document text
    • https://kodavagimiwebod.weebly.com/uploads/1/3/5/3/135346487/darosele.pdfIn PDF document text
    • http://ranixug.iblogger.org/occupational_health_assessment_report.pdfIn PDF document text
    • http://vuwagumewaga.iblogger.org/19418436647.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/descargar_tipos_de_graficos_para_excel_2010.pdfIn PDF document text
    • http://naturalik.fun/tosageriviwexuxevonozepkz10x.pdfIn PDF document text
    • https://mitigifagoted.weebly.com/uploads/1/3/5/3/135325532/7843259.pdfIn PDF document text
    • http://xagowawusik.66ghz.com/video_licensing_agreement_template.pdfIn PDF document text
    • http://scrlt.xyz/dell_inspiron_6400_bluetooth_turn_onr7vnb.pdfIn PDF document text
    • http://copyright-rules-help.com/runaxadafafevanipepurug1cl2z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_13817ff9b88c41d08f309f9baac8523c.pdf?index=trueIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_e7f5c63ed0f14d438319413e81e2b242.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fogibi/typewriter_repair_austin_texas.pdfIn PDF document text
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_65cb9fe59869462799ce99cbb6780adb.pdf?index=trueIn PDF document text
    • http://rigutogivopum.epizy.com/xozowebumawonufe.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/mazusirexekijiz.pdfIn PDF document text
    • http://wisalawisavu.epizy.com/pert_math_test_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/37756829550.pdfIn PDF document text
    • https://89511c73-251b-4bee-a1a5-5f4bd4863124.filesusr.com/ugd/f24cb8_b6ce1673d7eb4b2589997ab444a3c06d.pdf?index=trueIn PDF document text
    • http://sijadogif.atwebpages.com/pablo_neruda_quotes_in_spanish_and_english.pdfIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_debdf72bc7d447f6a135b08b1e76cbb7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/dulorowumuxokedu.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/12348513779.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_off0000f28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28C 5416 bytes
SHA-256: b99b765bf48bf5e7215afb96781943b5eeb5a8b9962129eb39ee8d09b8ab2517
font_01_sfnt_off000104df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DF 10244 bytes
SHA-256: 39b3a3cb2ea9ecfe275e2111608559b80c7a2ea48434e12a108cc82d5ecd437f

Open this report in the interactive analyzer, or submit your own file for analysis.