Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e915884aec1d103…

MALICIOUS

PDF

78.1 KB Created: 2021-04-28 09:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8627b8e9c30e1d085d6894257e57c9a0 SHA-1: 5b102580a9213db61e40e3e6642156405fb65fff SHA-256: 4e915884aec1d103bfbe542d05eae7991546c178f90795a3a0df2a108e5a91ca
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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://maypoin.ru/strik?utm_term=how+to+use+combat+knife+warzone PDF link annotation
    • http://theboldpantsproject.com/lapokededepilezkjog3.pdfIn PDF document text
    • http://momentikshop.space/40085820241axf4l.pdfIn PDF document text
    • http://eslivdrug.space/68271303248riiru.pdfIn PDF document text
    • https://tiluzapibijodok.weebly.com/uploads/1/3/4/2/134265907/luseronuzaro.pdfIn PDF document text
    • https://foxanebipukete.weebly.com/uploads/1/3/4/3/134309218/8962189.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/jemisajoda/free_virus_shawl_pattern.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f375a180-2804-4472-b68d-a0ee7da06aaf/what_can_pta_funds_be_spent_on.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/dofe_expedition_assessors_report_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e7e6021-31d8-4ee3-83b5-0c5dc17db859/how_to_simplify_a_ratio_of_factorials.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/dyson_dc59_battery_life.pdfIn PDF document text
    • http://mulapoxe.onlinewebshop.net/2967848353.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/70537754984.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/memoire_de_licence_en_agronomie.pdfIn PDF document text
    • http://gitojaxekeveki.onlinewebshop.net/wadosekafu.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/coal_briquetting_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf2b6907-503a-4251-bede-e218b7aa04a6/how_to_fix_leaking_delta_monitor_tub_faucet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b25634-0b43-4669-aada-7849d041be2f/wd_my_cloud_ex2_ultra_alternative_firmware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e0197b8-4d73-4594-b338-3b65b9a29544/lagutekaxikugebonewesog.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_off0000f160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF160 5304 bytes
SHA-256: b0dbbcc09b9f373d67ab74f41843ba2f74bf90f9631be311aadf3e69aa5cd7c7
font_01_sfnt_off00010371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10371 11696 bytes
SHA-256: 88352e802f776906d70dad1b6df6a454d2b0eda3acf859a367ca9774baf111f1

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