Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd68da11f4351ebb…

MALICIOUS

PDF

74.8 KB Created: 2021-03-13 20:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 110ea04e3eeed5552395df83d7dba178 SHA-1: 9962b4777fd5f87f290f3b6626306c9682a1af8e SHA-256: cd68da11f4351ebb2b3bd01e91d044e95ebd2d413199d82331f2c48971cdc14e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs pointing to disposable domains, a characteristic of link farms used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/award?keyword=fanuc+cnc+turning+programming+manual+pdf PDF link annotation
    • http://lerob.info/webibowaly08cw.pdfIn PDF document text
    • http://penageli.getenjoyment.net/goduxuwasalojuwota.pdfIn PDF document text
    • http://mists.space/android_screenshot_settingsxw9ky.pdfIn PDF document text
    • http://indonesia2health.online/24950763613ymp49.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/5131492991.pdfIn PDF document text
    • http://inostrana.com/eu_gdpr_pocket_guide5t01n.pdfIn PDF document text
    • http://womenit.space/fun_facts_about_spain_sportsfameg.pdfIn PDF document text
    • http://moitender.org/klondike_adventures_game_help0emhl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/additional_information_form_for_drug_licence.pdfIn PDF document text
    • http://pujumek.myartsonline.com/xofanawif.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/95746589086.pdfIn PDF document text
    • http://kilarosine.atwebpages.com/lifabilelubebebulozula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b546a030-ab3d-4b35-9b27-455f016b3f6f/wezixaxusifexe.pdfIn PDF document text
    • http://tivakifuzir.atwebpages.com/jijoferizixovinatesodixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef21aa3-2c85-4ccd-a6f1-23f114351e42/words_that_start_with_eda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ba70d6c-8c29-4ed7-861f-b64c70efadc4/vibixuko.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_off0000e68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68A 5252 bytes
SHA-256: 56af81d159ba69a6ef0a701929e24808af813eda1ae7dc02641fdbb12f43f3c1
font_01_sfnt_off0000f859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF859 11072 bytes
SHA-256: 20c1182478df0df659217f1183528d59b42bf6008668cd675864cf56eee0a96d

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