Malicious PDF — malware analysis report

Static analysis result for SHA-256 e053af4106d90327…

MALICIOUS

PDF

86.0 KB Created: 2021-04-12 23:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 34e5ee4997605f24967f1f53ff2e442a SHA-1: cc9c0195d1b582851c95f5c2dc68fefa21c8a6ed SHA-256: e053af4106d9032741531eb24a78bcbed06c47296ce7d32ba6ac0ae4accf831f
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with a prominent one being 'https://botokaw.ru/strik?utm_term=convert+mp3+to+musicxml+online', suggesting a lure to a malicious site. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for such links. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious intent, likely involving phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/strik?utm_term=convert+mp3+to+musicxml+online PDF link annotation
    • http://jokidinavefo.22web.org/elite_dangerous_mining_guide_4._0.pdfIn PDF document text
    • http://lusoxebi.iblogger.org/lozofa.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/dofipi.pdfIn PDF document text
    • http://goodsun.space/64352979996jxemt.pdfIn PDF document text
    • http://gimakelodikovij.iblogger.org/89324926664.pdfIn PDF document text
    • http://vujadijijevi.iblogger.org/adeept_smart_car_kit.pdfIn PDF document text
    • http://negifowutagur.mygamesonline.org/periodontologia_clinica_carranza_10_edicion_descargar.pdfIn PDF document text
    • http://shtancircul.site/juregoxovefijola7b205.pdfIn PDF document text
    • http://autolombardpro.ru/rifixitelk6eu7.pdfIn PDF document text
    • http://gnoogle.site/72102449848vjpq8.pdfIn PDF document text
    • http://requiredjokblog.com/2964672673wwzxx.pdfIn PDF document text
    • http://resipowepo.getenjoyment.net/actionscript_3._0_cookbook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://derekage.epizy.com/outlook_email_template_image_size.pdfIn PDF document text
    • http://gogolozumer.epizy.com/dental_anatomy_coloring_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7244463-7f9d-4615-a1ca-3211c2d1e0ad/what_is_a_clp_label.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/30665902663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d825df6-4fed-4faf-a77d-19cccfe94ee9/letra_y_musica_del_himno_al_maestro_en_venezuela.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_10d54fa9232e4ccbb45ba5e13ebc5f4c.pdf?index=trueIn PDF document text
    • http://rozosijamuruxo.rf.gd/graphic_design_free_courses_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff54dfa3-c1cd-4ebd-b0df-f700c7c4ab3e/simutumujedasom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb44f56-01b8-41bc-8829-486fddda4cc3/pegogavedufodujilafut.pdfIn PDF document text
    • http://sabasil.epizy.com/uptet_junior_answer_key_2020_download.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_a7fce65ae637419ead61942c97c54830.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_0ed3ffa5e3ca4ec49d3873f65d8d5ad1.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_off00011324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11324 5068 bytes
SHA-256: a9946e8ed4e5a2fd4ea4ec2882feced4bab2aca2f01502221f8226ba65ee7628
font_01_sfnt_off00012454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12454 11264 bytes
SHA-256: 295179042488deaa410da66ae5488aef543c3ed88e8c27ed728a27cb9734ee23