Malicious PDF — malware analysis report

Static analysis result for SHA-256 e323429d7efb3550…

MALICIOUS

PDF

76.0 KB Created: 2021-04-17 10:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 409e20d719871203f240e5bdcf65954b SHA-1: 22de762c4d7ffa7a91c5f11aa116c6d11ce7ae5a SHA-256: e323429d7efb35509d0b4074a561150b714cf9e286751829e3dd6778417f0106
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or directing users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URI heuristics suggest an attempt to leverage external resources for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://leonvi.ru/strik?utm_term=the+art+of+social+media+power+tips+for+power+users+summary PDF link annotation
    • https://cdn.sqhk.co/fuwunikuneg/4jghdhj/87575745006.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/Njfzqjj/mechanical_engineering_degree_plan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://67dc9804-4028-4298-afd7-d431d2c16fe6.filesusr.com/ugd/559c84_674814a9738d4b21a42096e13e4c1b30.pdf?index=trueIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_c209dd298e2b4341bcebcfd870c0871c.pdf?index=trueIn PDF document text
    • https://025b4bf0-2906-4f5f-8a0f-6d4b68fc9518.filesusr.com/ugd/148ee2_1439029f1374490dbb841f0f96827b54.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/america_s_got_talent_finale_guest_performers.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/38907550814.pdfIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_021ebd258a864f21a2d67c0bbe9907ae.pdf?index=trueIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_26c19c012bcd44b89f992f84ced00ecf.pdf?index=trueIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_4e0ff1e8152f48a9931be63f13570844.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/garorowa/gefolewolunozozenip.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/dreamweaver_8_free_serial_key.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_906a3eafc67f49a0b6f1379d0b425054.pdf?index=trueIn PDF document text
    • https://3491c55f-27e3-40bb-839b-e55f5d2a6f06.filesusr.com/ugd/d14465_8e40549adc9d49f0b40388562fdf44f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/ca_lease_agreement_2020.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_864a9b67ce5c41d4bd9a147edc9b9dc0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vufupu/asp_net_mvc_5_tutorial_step_by_step_for_beginners.pdfIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_1a82d1c1b19d4a4da6baa7a1e076a497.pdf?index=trueIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_d2de46cea14e4e5db50d5394900324bd.pdf?index=trueIn PDF document text
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_304afdeb30dd45fd8e852f247c0b8627.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/microsoft_lumia_535_mobile_apps_free.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_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 5540 bytes
SHA-256: 69d0d2ebe05938f9c83eef1d938c2e924c982a0468daa1b5111dc220ce9cf185
font_01_sfnt_off0000fe49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE49 10588 bytes
SHA-256: edcc6806135cdfdfe76cbc5ba4af2f9fe16638cba166e44c34ca131377a650fb

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