Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e854da6fbcf0a0…

MALICIOUS

PDF

81.3 KB Created: 2021-03-31 04:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1ae2bd1b43def3975ec1439c0948572a SHA-1: 591727e034bab85cf151bb49173b5d7df7809ced SHA-256: e2e854da6fbcf0a0d482def811a8e5b0e4dc981ba7f1c7c1c47348dc8af4c2dc
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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.
  • 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=how+to+get+a+fine+dining+server+job PDF link annotation
    • http://vexezujuzas.scienceontheweb.net/sazoter.pdfIn PDF document text
    • http://euromarket.pro/136065419495cq71.pdfIn PDF document text
    • http://topmassage.net/53739310099w8gc0.pdfIn PDF document text
    • http://suvolupijiro.mygamesonline.org/estrategias_de_aprendizaje_colaborativo.pdfIn PDF document text
    • http://uniques.space/kabuluniseforegesoazscp.pdfIn PDF document text
    • http://pc-remont.website/27964877675wk3go.pdfIn PDF document text
    • http://tiktokfrance.fun/definition_of_formal_assessment_in_educationyhchx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jawuwibunoropo.atwebpages.com/76249396834.pdfIn PDF document text
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_cf50ec1893714a78a5240c28f7cf8d10.pdf?index=trueIn PDF document text
    • https://e8329085-1058-49d3-a03f-79dfd6d7647e.filesusr.com/ugd/f96b02_c0ac1fee62374f70aad769b6479631de.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/395d4c33-ea53-4a8b-b712-9347d7c7222e/how_much_does_a_5000_mile_harley_service_cost.pdfIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_6be965ddcf0a49d8ac680c4028ad7073.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b2db07b-621b-4244-bffc-8f67467cb0a7/the_left_hand_of_darkness_summary_sparknotes.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_46de46f311dd49fca4983029adc6e3db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/136899161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ccfeeab-8bdc-4773-afe2-5fa308cc5858/panasonic_microwave_inverter_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/do_mary_poppins_and_bert_get_together.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e3a5d63-1e9f-4204-ab4b-940060cdf1e2/41873655.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/who_is_lady_antebellum_married_to.pdfIn PDF document text
    • http://zobuwijezad.onlinewebshop.net/72468608638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c5eee4-4e22-43a9-bd10-3a159a8d8ccf/44172618976.pdfIn PDF document text
    • http://gototura.myartsonline.com/36377191849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7282d8c7-e43f-4a21-a724-7814d6cd77ce/bawabefefodawelinusafis.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/how_to_answer_what_is_your_leadership_philosophy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3493481-5f6c-439b-aa34-5bebc366f518/19628068353.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_off0000fd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9B 5372 bytes
SHA-256: 0c8301330de6e3611ba0bf388c46c549bccc3874c18da271c904a893ddda4338
font_01_sfnt_off0001100e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100E 11612 bytes
SHA-256: 3eb89540f3d2ff649e5d4cf9a205a9670ca168320983e9ed35abf14625d1888d