Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03b9dba55fe0a4d…

MALICIOUS

PDF

77.4 KB Created: 2021-03-27 16:20:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6c25d004db63b143069705f6bb502e0d SHA-1: 2db5a82b6436229337120e814ee5edabde720a42 SHA-256: e03b9dba55fe0a4d20a793ab256eedbaffb336ec832404b7d38d908792b7f599
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, suggesting a phishing or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/wix?keyword=hunting+guide+osrs+1-99 PDF link annotation
    • https://cdn.sqhk.co/foturozav/eYhbpOC/uber_argentina_requisitos.pdfIn PDF document text
    • https://cdn.sqhk.co/wanazofemuvu/jjUd0jg/avast_2019_full_free.pdfIn PDF document text
    • http://afracheat7.xyz/lifesmart_infrared_heaters_reviewshwn1i.pdfIn PDF document text
    • http://lady-bug.club/6420952197n5b7c.pdfIn PDF document text
    • http://chambreop.xyz/what_to_do_when_your_thermostat_goes_blankd95r8.pdfIn PDF document text
    • https://cdn.sqhk.co/boremagu/ibWiihf/lavasioth_guide_mhw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_6323a08c7b9a4a8d812e0ba42bbc79de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/tetakibigikugutizofojude.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/68556221886.pdfIn PDF document text
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_d5a40461ecf046d5b5f84c32cbbd18d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/what_does_a_music_note_tattoo_under_the_eye_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/dojujif.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/garanavaponupitalepem.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/29958206766.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/satenisarovexovavasuzuwas.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/how_to_answer_interview_appointment_email.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/hyaluronic_acid_mask_sheet_how_to_use.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_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 4952 bytes
SHA-256: f33c4d4f3a9956fb6999099ac7f16f8c06a2b3ed54634dac0fe03c77916bdfd5
font_01_sfnt_off00010236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10236 10832 bytes
SHA-256: 0ee50f6945c3f9676831411fe54c13f452afed3c8033cf2bd84e53ff51907098

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