Malicious PDF — malware analysis report

Static analysis result for SHA-256 286c9248b9986cd0…

MALICIOUS

PDF

74.9 KB Created: 2021-03-23 02:59:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 000947b9a11db2da78d4ade8a1537bc0 SHA-1: b5f92ca2a96b0c78fcb0310f1e9bbea9ae94ce0f SHA-256: 286c9248b9986cd0b8f2716040c62928a23bad0faec072e46e5d5c81bc2c2ccb
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely part of a phishing or malware distribution scheme. The PDF structure and embedded links suggest it is designed to redirect users to potentially harmful websites.

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://mezovuduw.ru/wix?keyword=80th+anniversary+iron+man PDF link annotation
    • http://supariwepexafat.mywebcommunity.org/assinatura_digital_invalida.pdfIn PDF document text
    • http://jobauthor.online/45643356254p1igw.pdfIn PDF document text
    • http://yandex-delivery.cc/kuluzezudakisumqyw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_5fd85e76affd1.pdfIn PDF document text
    • http://tonemisi.medianewsonline.com/tunabobifunuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/cBbKgfF/9078849039.pdfIn PDF document text
    • http://gk-kuban.ru/genie_pmx500ic_b_homelinkmz7qo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_601cb10450718.pdfIn PDF document text
    • https://cdn.sqhk.co/nutanujel/cjchagB/xodesedorozukason.pdfIn PDF document text
    • http://demask.space/53380094474c87kq.pdfIn PDF document text
    • http://finansi-7.online/welezulafefevipazabelujewup9l0.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/tecnologias_de_la_informacion_libros.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/359bccbc-e9e9-4fb4-829c-2882e1eea839/74993863297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/052fabfc-b1d2-4651-a3ee-b3f4f435008a/mudusuresun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d746202-15d7-461d-b0a7-e6150725787b/64177219478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89288c3f-6720-431f-8fb1-de3b454e8d34/objetivo_del_presupuesto_de_inversiones_capitalizables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9074d007-a737-4559-8e60-0804b7b752ee/which_is_more_difficult_ca_or_cfa.pdfIn PDF document text
    • http://vizozaforuf.atwebpages.com/autocad_drawing_conversion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47644341-d4cf-4265-a550-a1335fe3dc3f/48348481617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73df2b37-13c4-4321-9b15-30d2d6596922/zunuvexuvuruliwoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4270b2-c569-4d5a-aa1f-c2c8b9a04a91/47430385926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d34e9661-d076-4bac-8cff-aee642bb16b6/wojododukilotoruf.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_off0000e91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91F 5296 bytes
SHA-256: e15153ecf2609e53556640bfcba0172d626b5e910f11707a881ab7c9d4123760
font_01_sfnt_off0000fb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB00 10272 bytes
SHA-256: b6b6285b4dc9df41947cbf271e8c4c5f00ca58942e13fe3f9b6d3fe440776099

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