Malicious PDF — malware analysis report

Static analysis result for SHA-256 079c329433ecc113…

MALICIOUS

PDF

77.3 KB Created: 2021-03-21 11:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 652694786ca109e92941f06fe1bad22b SHA-1: b0761dde157cc75235a1a5fe044a68bcc4aeeb3b SHA-256: 079c329433ecc1130cae5cfe0bf444ee21be1d4765da825f519625f79ba7f1b1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The presence of external URIs and a link farm heuristic suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect the user to a compromised site.

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 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://ponafet.ru/strik?utm_term=city+green+book+theme PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484805/normal_603250ba4de2e.pdfIn PDF document text
    • http://boforobevuziko.mywebcommunity.org/lista_de_aditivos_alimentares.pdfIn PDF document text
    • http://gagefiwirimat.medianewsonline.com/pofuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445750/normal_6009caf91fbc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_602c74c23732a.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/50718991392.pdfIn PDF document text
    • http://xutusurekawidi.medianewsonline.com/37617028527.pdfIn PDF document text
    • http://mevixonur.mywebcommunity.org/29021246506.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/how_to_get_a_fine_dining_server_job.pdfIn PDF document text
    • http://suwetobolubujub.getenjoyment.net/pengertian_sumber_daya_manusia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463808/normal_5fe2f11f832a2.pdfIn PDF document text
    • http://ruwosiju.getenjoyment.net/acuerdos_comerciales_de_mexico_con_otros_paises.pdfIn PDF document text
    • http://xikisavi.scienceontheweb.net/bescherelle_anglais_gratuit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lusajafimaneru.myartsonline.com/makalah_agama_islam_tentang_akhlak.pdfIn PDF document text
    • http://movasedumanepe.onlinewebshop.net/defunatarug.pdfIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_ee77d44702f54e64a59842cb17666850.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/667f4e62-d49b-474d-a2ab-48c618b0eb30/xuraxijulawepura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ede1660-9163-4b7b-a461-0aa17283d79c/how_to_turn_off_call_forwarding_on_panasonic_phone.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_bd47cb00b30f4358aebac6f541535b2e.pdf?index=trueIn PDF document text
    • http://vesedakowata.onlinewebshop.net/fuzijiwuzakubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bbae6ad-5b86-40d3-a0db-0ab5208bde72/janenilajiterenajimusud.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_off0000ef9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9F 4892 bytes
SHA-256: cba4cf5e36296f05b5643df2bb3451a5c49e9a6c49a6d6215bf1f37ffa7002a6
font_01_sfnt_off00010026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10026 11160 bytes
SHA-256: 70f67c1d77b8d774dacc0382cf384906f47a61df3f5a4ec611e30841811735ca